{
  "revision": "R7 single stock 24 mm",
  "calculation_complete": true,
  "construction_ready": false,
  "capacity_pass": null,
  "source_sha256": "ddd2e92087d15654e6def325b7958d54a06157ea276c5c07ce292ff6468d358e",
  "inputs_sha256": {
    "build/r7_foot_revision/structure/inputs/frame.json": "6ba4fd94a2c5f67578db0a32569bb744658dd19fddbaa9693b4d6c4342f3432b",
    "build/r7_foot_revision/structure/inputs/foot_analysis.json": "ba61f945df48b8cdd885d63e64348ac9752d5bdd0e1280fc01c22356129fd4f7",
    "build/r7_foot_revision/structure/inputs/source_binding.json": "649012fc8f175990faf242399cf1d5a6047d6302ec0de8b1079bb1056408c66d",
    "build/r7_foot_revision/structure/inputs/topology.json": "e2516c9b72049fc86e05810169122ce58bd1eed3e7d49c6f652088d49f0a565e",
    "build/r7_foot_revision/structure/inputs/candidate_foot_24173701444d21f3.json": "24173701444d21f3b176ab822e871429ebc74b9657da1d3c7f812f71dc834a32"
  },
  "checked_stage5_input_sha256": {
    "build/r7/topology.json": "e2516c9b72049fc86e05810169122ce58bd1eed3e7d49c6f652088d49f0a565e",
    "build/r7/assembly/assembly.json": "08cde715f93b55e22752315fb989844058c7f282af5578856e392bbca424fcaa",
    "build/r7/assembly/foot_analysis.json": "ba61f945df48b8cdd885d63e64348ac9752d5bdd0e1280fc01c22356129fd4f7",
    "build/r7/finishings/finishings.json": "f7c0d7aa07c19e33ab75944ebc0aaeda06f06ea9810c6fe2f2bd448af2f97432",
    "build/r7/actual_structure.json": "24f39c8893f803091a222c4f1f54cfaa57f23d2d59f5e3cb066173346e11d3c0",
    "build/foot_key_prototype/r7/prototype.json": "ce9c72552c21a84fae0d6fc1305613f1a83fb1da0a6f89e959f37c123639c1cf"
  },
  "stage5_binding_verified_at_capture": true,
  "source_scope": "65 nodes /168 strips /104 facets; preserved stage4 mass and stage5 prescribed joint kinematics; no global recalculation of the new foot",
  "layout": {
    "upper_bolts": [
      {
        "bolt": "RF37_UPPER0",
        "z_mm": 220.0,
        "source_grip_mm": 150.14137819594,
        "source_length_mm": 180,
        "leg_intervals_mm": [
          [
            -62.60531127103963,
            -36.40565327103963
          ],
          [
            36.40565427103964,
            62.605310271039635
          ]
        ],
        "inner_gap_after_removal_old30_mm": 21.405654271039637,
        "inner_gap_central24_mm": 24.405654271039637,
        "radial_bolt_arm_to_leg_bearing_centre_mm": 37.50548227103964,
        "cantilever_reference_deflection_per_kN_mm": 0.20085788371059612,
        "cantilever_reference_bending_per_kN_MPa": 431.79853128482387
      },
      {
        "bolt": "RF37_UPPER1",
        "z_mm": 274.93599366977526,
        "source_grip_mm": 198.14137819594,
        "source_length_mm": 220,
        "leg_intervals_mm": [
          [
            -86.60530827103963,
            -60.40565427103964
          ],
          [
            60.40565427103964,
            86.60530327103963
          ]
        ],
        "inner_gap_after_removal_old30_mm": 45.40565427103964,
        "inner_gap_central24_mm": 48.40565427103964,
        "radial_bolt_arm_to_leg_bearing_centre_mm": 61.505478771039634,
        "cantilever_reference_deflection_per_kN_mm": 0.885821118946318,
        "cantilever_reference_bending_per_kN_MPa": 708.1091560796145
      },
      {
        "bolt": "RF37_UPPER2",
        "z_mm": 329.8719873395505,
        "source_grip_mm": 246.14137819594,
        "source_length_mm": 280.0,
        "leg_intervals_mm": [
          [
            -110.60530927103963,
            -84.40564827103962
          ],
          [
            84.40564827103962,
            110.60531127103962
          ]
        ],
        "inner_gap_after_removal_old30_mm": 69.40564827103962,
        "inner_gap_central24_mm": 72.40564827103962,
        "radial_bolt_arm_to_leg_bearing_centre_mm": 85.50547977103963,
        "cantilever_reference_deflection_per_kN_mm": 2.380052100867399,
        "cantilever_reference_bending_per_kN_MPa": 984.4198326826552
      }
    ],
    "leg_bolt_face_angle_deg": 23.645789543910663,
    "local_pad": {
      "footprint_XZ_mm": [
        50.0,
        44.0
      ],
      "thickness_variation_mm": 20.678243425765867,
      "available_minimum_residual_from24_mm": 3.321756574234133,
      "status": "plane geometry only; small residue is not a strength allowance; washer footprint must be checked separately"
    },
    "parallel_cheeks": {
      "stack_mm": 72.0,
      "hole_axis": "normal to leg faces",
      "candidate_M12_length_mm": 100.0,
      "washer_pair_mm": 6.0,
      "nut_h_mm": 10.8,
      "nominal_protrusion_mm": 11.2,
      "nominal_thread_b_mm": 30.0,
      "nominal_clamp_margin_mm": 8,
      "max_moment_per_kN_Nmm": 9000.0,
      "bending_per_kN_MPa": 103.61649940878605,
      "centre_bearing_per_kN_MPa": 3.4722222222222223,
      "outer_bearing_per_kN_MPa": 1.7361111111111112,
      "status": "leg_to_two_cheeks_only; requires separate six-component cheek-to-foot interface"
    },
    "lower_stack_candidate": {
      "wood_layers_mm": [
        24,
        24,
        24,
        24,
        24
      ],
      "wood_total_mm": 120.0,
      "steel_total_mm": 10.0,
      "nominal_M12_length_mm": 160.0,
      "washers_total_mm": 5.0,
      "nut_h_mm": 10.8,
      "nominal_protrusion_mm": 14.2,
      "nominal_clamp_margin_mm": 11,
      "note": "Separate dry layers; no composite EI or equal reaction split assumed."
    }
  },
  "baseline_layout": {
    "upper_bolts": [
      {
        "bolt": "F37_UPPER0",
        "z_mm": 220.0,
        "source_grip_mm": 155.88886638332144,
        "source_length_mm": 180,
        "leg_intervals_mm": [
          [
            -62.605312,
            -36.405652
          ],
          [
            36.405652,
            62.605312
          ]
        ],
        "inner_gap_after_removal_old30_mm": 21.405652000000003,
        "inner_gap_central24_mm": 24.405652000000003,
        "radial_bolt_arm_to_leg_bearing_centre_mm": 37.505482,
        "cantilever_reference_deflection_per_kN_mm": 0.2008578793559969,
        "cantilever_reference_bending_per_kN_MPa": 431.7985281643596
      },
      {
        "bolt": "F37_UPPER1",
        "z_mm": 270.0,
        "source_grip_mm": 199.57607106786028,
        "source_length_mm": 220,
        "leg_intervals_mm": [
          [
            -84.448913,
            -58.249255
          ],
          [
            58.249255,
            84.448917
          ]
        ],
        "inner_gap_after_removal_old30_mm": 43.249255,
        "inner_gap_central24_mm": 46.249255,
        "radial_bolt_arm_to_leg_bearing_centre_mm": 59.349086,
        "cantilever_reference_deflection_per_kN_mm": 0.7958784120669216,
        "cantilever_reference_bending_per_kN_MPa": 683.2827260478881
      },
      {
        "bolt": "F37_UPPER2",
        "z_mm": 320.0,
        "source_grip_mm": 243.26327575239907,
        "source_length_mm": 270,
        "leg_intervals_mm": [
          [
            -106.292518,
            -80.092856
          ],
          [
            80.092862,
            106.292518
          ]
        ],
        "inner_gap_after_removal_old30_mm": 65.092862,
        "inner_gap_central24_mm": 68.092862,
        "radial_bolt_arm_to_leg_bearing_centre_mm": 81.19269,
        "cantilever_reference_deflection_per_kN_mm": 2.0377711554006326,
        "cantilever_reference_bending_per_kN_MPa": 934.7669239314166
      }
    ],
    "leg_bolt_face_angle_deg": 23.645789543910663,
    "local_pad": {
      "footprint_XZ_mm": [
        50.0,
        44.0
      ],
      "thickness_variation_mm": 20.678243425765864,
      "available_minimum_residual_from24_mm": 3.3217565742341364,
      "status": "plane geometry only; small residue is not a strength allowance; washer footprint must be checked separately"
    },
    "parallel_cheeks": {
      "stack_mm": 72.0,
      "hole_axis": "normal to leg faces",
      "candidate_M12_length_mm": 100.0,
      "washer_pair_mm": 6.0,
      "nut_h_mm": 10.8,
      "nominal_protrusion_mm": 11.2,
      "nominal_thread_b_mm": 30.0,
      "nominal_clamp_margin_mm": 8,
      "max_moment_per_kN_Nmm": 9000.0,
      "bending_per_kN_MPa": 103.61649940878605,
      "centre_bearing_per_kN_MPa": 3.4722222222222223,
      "outer_bearing_per_kN_MPa": 1.7361111111111112,
      "status": "leg_to_two_cheeks_only; requires separate six-component cheek-to-foot interface"
    },
    "lower_stack_candidate": {
      "wood_layers_mm": [
        24,
        24,
        24,
        24,
        24
      ],
      "wood_total_mm": 120.0,
      "steel_total_mm": 10.0,
      "nominal_M12_length_mm": 160.0,
      "washers_total_mm": 5.0,
      "nut_h_mm": 10.8,
      "nominal_protrusion_mm": 14.2,
      "nominal_clamp_margin_mm": 11,
      "note": "Separate dry layers; no composite EI or equal reaction split assumed."
    }
  },
  "steel_flexure_reference": [
    {
      "diameter_mm": 9.6,
      "arm_stiffness_N_per_mm": [
        4978.644509870666,
        1128.896092689117,
        420.1588694783423
      ],
      "elastic_rotation_centre_z_mm": 236.57256420169577,
      "one_leg_Y_rotation_Nmm_per_rad": 6686231.548373244,
      "two_legs_formal_sum_kNm_per_rad": 13.372463096746488,
      "end_rotation_fixed_multiplier": 4.0,
      "steel_E_MPa": 210000.0,
      "note": "Only bolt bending with identical X arm springs; no toe, wood bearing, pretension, washer flexure or opening. End-rotation restraint changes k by factor4. Do not insert this scalar as measured joint K."
    },
    {
      "diameter_mm": 12.0,
      "arm_stiffness_N_per_mm": [
        12154.893822926433,
        2756.09397629179,
        1025.7784899373594
      ],
      "elastic_rotation_centre_z_mm": 236.5725642016958,
      "one_leg_Y_rotation_Nmm_per_rad": 16323807.491145618,
      "two_legs_formal_sum_kNm_per_rad": 32.64761498229124,
      "end_rotation_fixed_multiplier": 4.0,
      "steel_E_MPa": 210000.0,
      "note": "Only bolt bending with identical X arm springs; no toe, wood bearing, pretension, washer flexure or opening. End-rotation restraint changes k by factor4. Do not insert this scalar as measured joint K."
    }
  ],
  "actual_hole_geometry": {
    "holes": [
      {
        "part": "B_E136",
        "bolt": "RF37_UPPER0",
        "kind": "strip",
        "grain_axis": "local_x",
        "hole_diameter_mm": 13.0,
        "face_bore_major_axis_mm": 14.191481496466885,
        "min_centre_to_edge_mm": 42.55640807772978,
        "min_clear_ligament_mm": 35.46376900474651,
        "faces": [
          {
            "face_z_mm": -12.0,
            "centre_to_outer_edge_mm": 42.55640807773024,
            "clear_ligament_mm": 35.46376900474697,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 0,
            "centre_to_outer_edge_mm": 42.556408077730296,
            "clear_ligament_mm": 35.46376900474703,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 12.0,
            "centre_to_outer_edge_mm": 42.55640807772978,
            "clear_ligament_mm": 35.46376900474651,
            "hole_outside_area_mm2": 0.0
          }
        ]
      },
      {
        "part": "B_E136",
        "bolt": "RF37_UPPER1",
        "kind": "strip",
        "grain_axis": "local_x",
        "hole_diameter_mm": 13.0,
        "face_bore_major_axis_mm": 14.191481496466885,
        "min_centre_to_edge_mm": 93.13306286160139,
        "min_clear_ligament_mm": 86.54055005291812,
        "faces": [
          {
            "face_z_mm": -12.0,
            "centre_to_outer_edge_mm": 93.13306286160139,
            "clear_ligament_mm": 86.54055005291812,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 0,
            "centre_to_outer_edge_mm": 95.16486173802362,
            "clear_ligament_mm": 88.57234892934035,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 12.0,
            "centre_to_outer_edge_mm": 97.19666061444585,
            "clear_ligament_mm": 90.60414780576258,
            "hole_outside_area_mm2": 0.0
          }
        ]
      },
      {
        "part": "B_E136",
        "bolt": "RF37_UPPER2",
        "kind": "strip",
        "grain_axis": "local_x",
        "hole_diameter_mm": 13.0,
        "face_bore_major_axis_mm": 14.191481496466885,
        "min_centre_to_edge_mm": 73.36230287000555,
        "min_clear_ligament_mm": 66.76979006132228,
        "faces": [
          {
            "face_z_mm": -12.0,
            "centre_to_outer_edge_mm": 73.36230287000555,
            "clear_ligament_mm": 66.76979006132228,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 0,
            "centre_to_outer_edge_mm": 75.39410174642778,
            "clear_ligament_mm": 68.8015889377445,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 12.0,
            "centre_to_outer_edge_mm": 77.42590062285001,
            "clear_ligament_mm": 70.83338781416674,
            "hole_outside_area_mm2": 0.0
          }
        ]
      },
      {
        "part": "B_E137",
        "bolt": "RF37_UPPER0",
        "kind": "strip",
        "grain_axis": "local_x",
        "hole_diameter_mm": 13.0,
        "face_bore_major_axis_mm": 14.191481496466885,
        "min_centre_to_edge_mm": 42.55640807772978,
        "min_clear_ligament_mm": 35.46376900474651,
        "faces": [
          {
            "face_z_mm": -12.0,
            "centre_to_outer_edge_mm": 42.55640807772978,
            "clear_ligament_mm": 35.46376900474651,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 0,
            "centre_to_outer_edge_mm": 42.556408077730296,
            "clear_ligament_mm": 35.46376900474703,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 12.0,
            "centre_to_outer_edge_mm": 42.55640807773024,
            "clear_ligament_mm": 35.46376900474697,
            "hole_outside_area_mm2": 0.0
          }
        ]
      },
      {
        "part": "B_E137",
        "bolt": "RF37_UPPER1",
        "kind": "strip",
        "grain_axis": "local_x",
        "hole_diameter_mm": 13.0,
        "face_bore_major_axis_mm": 14.191481496466885,
        "min_centre_to_edge_mm": 93.13306286160139,
        "min_clear_ligament_mm": 86.54055005291812,
        "faces": [
          {
            "face_z_mm": -12.0,
            "centre_to_outer_edge_mm": 97.19666061444585,
            "clear_ligament_mm": 90.60414780576258,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 0,
            "centre_to_outer_edge_mm": 95.16486173802362,
            "clear_ligament_mm": 88.57234892934035,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 12.0,
            "centre_to_outer_edge_mm": 93.13306286160139,
            "clear_ligament_mm": 86.54055005291812,
            "hole_outside_area_mm2": 0.0
          }
        ]
      },
      {
        "part": "B_E137",
        "bolt": "RF37_UPPER2",
        "kind": "strip",
        "grain_axis": "local_x",
        "hole_diameter_mm": 13.0,
        "face_bore_major_axis_mm": 14.191481496466885,
        "min_centre_to_edge_mm": 73.36230287000555,
        "min_clear_ligament_mm": 66.76979006132228,
        "faces": [
          {
            "face_z_mm": -12.0,
            "centre_to_outer_edge_mm": 77.42590062285001,
            "clear_ligament_mm": 70.83338781416674,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 0,
            "centre_to_outer_edge_mm": 75.39410174642778,
            "clear_ligament_mm": 68.80158893774451,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 12.0,
            "centre_to_outer_edge_mm": 73.36230287000555,
            "clear_ligament_mm": 66.76979006132228,
            "hole_outside_area_mm2": 0.0
          }
        ]
      },
      {
        "part": "RF37_CENTRAL",
        "bolt": "RF37_UPPER0",
        "kind": "foot_plate",
        "grain_axis": "local_y",
        "hole_diameter_mm": 13.0,
        "face_bore_major_axis_mm": 13.0,
        "min_centre_to_edge_mm": 79.12700000000001,
        "min_clear_ligament_mm": 72.62700000000001,
        "faces": [
          {
            "face_z_mm": -12.0,
            "centre_to_outer_edge_mm": 79.12700000000001,
            "clear_ligament_mm": 72.62700000000001,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 0,
            "centre_to_outer_edge_mm": 79.12700000000001,
            "clear_ligament_mm": 72.62700000000001,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 12.0,
            "centre_to_outer_edge_mm": 79.12700000000001,
            "clear_ligament_mm": 72.62700000000001,
            "hole_outside_area_mm2": 0.0
          }
        ]
      },
      {
        "part": "RF37_CENTRAL",
        "bolt": "RF37_UPPER1",
        "kind": "foot_plate",
        "grain_axis": "local_y",
        "hole_diameter_mm": 13.0,
        "face_bore_major_axis_mm": 13.0,
        "min_centre_to_edge_mm": 79.12700000000001,
        "min_clear_ligament_mm": 72.62700000000001,
        "faces": [
          {
            "face_z_mm": -12.0,
            "centre_to_outer_edge_mm": 79.12700000000001,
            "clear_ligament_mm": 72.62700000000001,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 0,
            "centre_to_outer_edge_mm": 79.12700000000001,
            "clear_ligament_mm": 72.62700000000001,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 12.0,
            "centre_to_outer_edge_mm": 79.12700000000001,
            "clear_ligament_mm": 72.62700000000001,
            "hole_outside_area_mm2": 0.0
          }
        ]
      },
      {
        "part": "RF37_CENTRAL",
        "bolt": "RF37_UPPER2",
        "kind": "foot_plate",
        "grain_axis": "local_y",
        "hole_diameter_mm": 13.0,
        "face_bore_major_axis_mm": 13.0,
        "min_centre_to_edge_mm": 40.128012660449485,
        "min_clear_ligament_mm": 33.628012660449485,
        "faces": [
          {
            "face_z_mm": -12.0,
            "centre_to_outer_edge_mm": 40.128012660449485,
            "clear_ligament_mm": 33.628012660449485,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 0,
            "centre_to_outer_edge_mm": 40.128012660449485,
            "clear_ligament_mm": 33.628012660449485,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 12.0,
            "centre_to_outer_edge_mm": 40.128012660449485,
            "clear_ligament_mm": 33.628012660449485,
            "hole_outside_area_mm2": 0.0
          }
        ]
      },
      {
        "part": "RF37_CENTRAL",
        "bolt": "RF37_SUPPORT_TIE0",
        "kind": "foot_plate",
        "grain_axis": "local_y",
        "hole_diameter_mm": 13.0,
        "face_bore_major_axis_mm": 13.0,
        "min_centre_to_edge_mm": 38.0,
        "min_clear_ligament_mm": 31.500000000000004,
        "faces": [
          {
            "face_z_mm": -12.0,
            "centre_to_outer_edge_mm": 38.0,
            "clear_ligament_mm": 31.500000000000004,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 0,
            "centre_to_outer_edge_mm": 38.0,
            "clear_ligament_mm": 31.500000000000004,
            "hole_outside_area_mm2": 0.0
          },
          {
            "face_z_mm": 12.0,
            "centre_to_outer_edge_mm": 38.0,
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    "normative_scope": "SP64 section8 dowel table18 starts with pine/spruce and specific engineered wood. Cross-laminated birch plywood in an oblique dry multilayer stack is not automatically a tabulated pine double-shear joint. Plywood geometry, local bearing, net section and splitting need their own applicable resistance model.",
    "min_by_kind": {
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        "centre_to_edge_mm": 38.0,
        "clear_ligament_mm": 31.500000000000004
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      "foot_support": {
        "centre_to_edge_mm": 36.0,
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        "clear_ligament_mm": 35.46376900474635
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  "candidate_assembly_checks": {
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF37_INNER_-1_2_BEVEL",
            "distance_from_head_mm": [
              41.66502982693038,
              54.57068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF37_OUTER_-1_2",
            "distance_from_head_mm": [
              3.0000030979700085,
              15.465376826930381
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF37_SUPPORT_TIE0",
        "kind": "support_bolt",
        "d": 12.0,
        "length": 150,
        "grip": 120.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 105.25,
        "tip_protrusion_mm": 13.2,
        "nominal_clamped_stack_mm": 126.0,
        "nominal_clamp_margin_mm": 12.0,
        "layers": [
          {
            "part": "RF37_CENTRAL",
            "distance_from_head_mm": [
              51.0,
              75.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              27.0,
              51.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              3.0,
              27.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_1_L1",
            "distance_from_head_mm": [
              75.0,
              99.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_1_L2",
            "distance_from_head_mm": [
              99.0,
              123.0
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF37_SUPPORT_TIE1",
        "kind": "support_bolt",
        "d": 12.0,
        "length": 150,
        "grip": 120.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 105.25,
        "tip_protrusion_mm": 13.2,
        "nominal_clamped_stack_mm": 126.0,
        "nominal_clamp_margin_mm": 12.0,
        "layers": [
          {
            "part": "RF37_CENTRAL",
            "distance_from_head_mm": [
              51.0,
              75.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              27.0,
              51.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              3.0,
              27.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_1_L1",
            "distance_from_head_mm": [
              75.0,
              99.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_1_L2",
            "distance_from_head_mm": [
              99.0,
              123.0
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF37_BASE_TIE0",
        "kind": "plate_bolt",
        "d": 12.0,
        "length": 160.0,
        "grip": 130.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 115.25,
        "tip_protrusion_mm": 14.2,
        "nominal_clamped_stack_mm": 135.0,
        "nominal_clamp_margin_mm": 11.0,
        "layers": [
          {
            "part": "RF37_CENTRAL",
            "distance_from_head_mm": [
              55.5,
              79.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              31.5,
              55.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              7.5,
              31.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_1_L1",
            "distance_from_head_mm": [
              79.5,
              103.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_1_L2",
            "distance_from_head_mm": [
              103.5,
              127.5
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF37_ANGLE_-1",
            "distance_from_head_mm": [
              2.5,
              7.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_ANGLE_1",
            "distance_from_head_mm": [
              127.5,
              132.5
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF37_BASE_TIE1",
        "kind": "plate_bolt",
        "d": 12.0,
        "length": 160.0,
        "grip": 130.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 115.25,
        "tip_protrusion_mm": 14.2,
        "nominal_clamped_stack_mm": 135.0,
        "nominal_clamp_margin_mm": 11.0,
        "layers": [
          {
            "part": "RF37_CENTRAL",
            "distance_from_head_mm": [
              55.5,
              79.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              31.5,
              55.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              7.5,
              31.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_1_L1",
            "distance_from_head_mm": [
              79.5,
              103.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_SUPPORT_1_L2",
            "distance_from_head_mm": [
              103.5,
              127.5
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF37_ANGLE_-1",
            "distance_from_head_mm": [
              2.5,
              7.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF37_ANGLE_1",
            "distance_from_head_mm": [
              127.5,
              132.5
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF38_UPPER0",
        "kind": "foot_bolt",
        "d": 12.0,
        "length": 180,
        "grip": 150.14137819594,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 135.25,
        "tip_protrusion_mm": 13.058621804059992,
        "nominal_clamped_stack_mm": 156.14137819594,
        "nominal_clamp_margin_mm": 12.141378195940007,
        "layers": [
          {
            "part": "B_E138",
            "distance_from_head_mm": [
              114.47634336900964,
              140.67599936900965
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "B_E139",
            "distance_from_head_mm": [
              15.465377826930371,
              41.66503582693037
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_CENTRAL",
            "distance_from_head_mm": [
              66.07068909797,
              90.07068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_INNER_1_0_FLAT0",
            "distance_from_head_mm": [
              90.07068909797,
              101.57068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_1_0_BEVEL",
            "distance_from_head_mm": [
              101.57068909797,
              114.47634236900964
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF38_OUTER_1_0",
            "distance_from_head_mm": [
              140.67599836900965,
              153.14137509797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_-1_0_FLAT0",
            "distance_from_head_mm": [
              54.57068909797,
              66.07068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_-1_0_BEVEL",
            "distance_from_head_mm": [
              41.665034826930366,
              54.57068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF38_OUTER_-1_0",
            "distance_from_head_mm": [
              3.0000030979700085,
              15.465377826930371
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF38_UPPER1",
        "kind": "foot_bolt",
        "d": 12.0,
        "length": 220,
        "grip": 198.14137819594,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 49.0,
        "min_smooth_shank_mm": 162.25,
        "tip_protrusion_mm": 5.058621804059992,
        "nominal_clamped_stack_mm": 204.14137819594,
        "nominal_clamp_margin_mm": 33.14137819594001,
        "layers": [
          {
            "part": "B_E138",
            "distance_from_head_mm": [
              162.47634336900964,
              188.67599236900963
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "B_E139",
            "distance_from_head_mm": [
              15.465380826930371,
              41.665034826930366
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_CENTRAL",
            "distance_from_head_mm": [
              90.07068909797,
              114.07068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_INNER_1_1_FLAT0",
            "distance_from_head_mm": [
              114.07068909797,
              125.57068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_1_1_FLAT1",
            "distance_from_head_mm": [
              125.57068909797,
              149.57068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_1_1_BEVEL",
            "distance_from_head_mm": [
              149.57068909797,
              162.47633736900963
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF38_OUTER_1_1",
            "distance_from_head_mm": [
              188.67599436900963,
              201.14137509797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_-1_1_FLAT0",
            "distance_from_head_mm": [
              78.57068909797,
              90.07068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_-1_1_FLAT1",
            "distance_from_head_mm": [
              54.57068909797,
              78.57068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_-1_1_BEVEL",
            "distance_from_head_mm": [
              41.66503982693037,
              54.57068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF38_OUTER_-1_1",
            "distance_from_head_mm": [
              3.0000030979700085,
              15.465385826930373
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF38_UPPER2",
        "kind": "foot_bolt",
        "d": 12.0,
        "length": 280.0,
        "grip": 246.14137819594,
        "standard": "DIN933 8.8, fully threaded",
        "nominal_thread_length_mm": 280.0,
        "min_smooth_shank_mm": 0.0,
        "tip_protrusion_mm": 17.058621804059992,
        "nominal_clamped_stack_mm": 252.14137819594,
        "nominal_clamp_margin_mm": 252.14137819594,
        "layers": [
          {
            "part": "B_E138",
            "distance_from_head_mm": [
              210.47633736900963,
              236.6760003690096
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "B_E139",
            "distance_from_head_mm": [
              15.465379826930373,
              41.66504082693038
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF38_CENTRAL",
            "distance_from_head_mm": [
              114.07068909797,
              138.07068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF38_INNER_1_2_FLAT0",
            "distance_from_head_mm": [
              138.07068909797,
              149.57068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_1_2_FLAT1",
            "distance_from_head_mm": [
              149.57068909797,
              173.57068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_1_2_FLAT2",
            "distance_from_head_mm": [
              173.57068909797,
              197.57068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_1_2_BEVEL",
            "distance_from_head_mm": [
              197.57068909797,
              210.47634736900963
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF38_OUTER_1_2",
            "distance_from_head_mm": [
              236.6760023690096,
              249.14137509797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_-1_2_FLAT0",
            "distance_from_head_mm": [
              102.57068909797,
              114.07068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_-1_2_FLAT1",
            "distance_from_head_mm": [
              78.57068909797,
              102.57068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_-1_2_FLAT2",
            "distance_from_head_mm": [
              54.57068909797,
              78.57068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF38_INNER_-1_2_BEVEL",
            "distance_from_head_mm": [
              41.66502982693038,
              54.57068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF38_OUTER_-1_2",
            "distance_from_head_mm": [
              3.0000030979700085,
              15.465376826930381
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF38_SUPPORT_TIE0",
        "kind": "support_bolt",
        "d": 12.0,
        "length": 150,
        "grip": 120.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 105.25,
        "tip_protrusion_mm": 13.2,
        "nominal_clamped_stack_mm": 126.0,
        "nominal_clamp_margin_mm": 12.0,
        "layers": [
          {
            "part": "RF38_CENTRAL",
            "distance_from_head_mm": [
              51.0,
              75.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              27.0,
              51.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              3.0,
              27.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_1_L1",
            "distance_from_head_mm": [
              75.0,
              99.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_1_L2",
            "distance_from_head_mm": [
              99.0,
              123.0
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF38_SUPPORT_TIE1",
        "kind": "support_bolt",
        "d": 12.0,
        "length": 150,
        "grip": 120.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 105.25,
        "tip_protrusion_mm": 13.2,
        "nominal_clamped_stack_mm": 126.0,
        "nominal_clamp_margin_mm": 12.0,
        "layers": [
          {
            "part": "RF38_CENTRAL",
            "distance_from_head_mm": [
              51.0,
              75.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              27.0,
              51.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              3.0,
              27.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_1_L1",
            "distance_from_head_mm": [
              75.0,
              99.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_1_L2",
            "distance_from_head_mm": [
              99.0,
              123.0
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF38_BASE_TIE0",
        "kind": "plate_bolt",
        "d": 12.0,
        "length": 160.0,
        "grip": 130.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 115.25,
        "tip_protrusion_mm": 14.2,
        "nominal_clamped_stack_mm": 135.0,
        "nominal_clamp_margin_mm": 11.0,
        "layers": [
          {
            "part": "RF38_CENTRAL",
            "distance_from_head_mm": [
              55.5,
              79.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              31.5,
              55.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              7.5,
              31.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_1_L1",
            "distance_from_head_mm": [
              79.5,
              103.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_1_L2",
            "distance_from_head_mm": [
              103.5,
              127.5
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF38_ANGLE_-1",
            "distance_from_head_mm": [
              2.5,
              7.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_ANGLE_1",
            "distance_from_head_mm": [
              127.5,
              132.5
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF38_BASE_TIE1",
        "kind": "plate_bolt",
        "d": 12.0,
        "length": 160.0,
        "grip": 130.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 115.25,
        "tip_protrusion_mm": 14.2,
        "nominal_clamped_stack_mm": 135.0,
        "nominal_clamp_margin_mm": 11.0,
        "layers": [
          {
            "part": "RF38_CENTRAL",
            "distance_from_head_mm": [
              55.5,
              79.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              31.5,
              55.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              7.5,
              31.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_1_L1",
            "distance_from_head_mm": [
              79.5,
              103.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_SUPPORT_1_L2",
            "distance_from_head_mm": [
              103.5,
              127.5
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF38_ANGLE_-1",
            "distance_from_head_mm": [
              2.5,
              7.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF38_ANGLE_1",
            "distance_from_head_mm": [
              127.5,
              132.5
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF39_UPPER0",
        "kind": "foot_bolt",
        "d": 12.0,
        "length": 180,
        "grip": 150.14137819594,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 135.25,
        "tip_protrusion_mm": 13.058621804059992,
        "nominal_clamped_stack_mm": 156.14137819594,
        "nominal_clamp_margin_mm": 12.141378195940007,
        "layers": [
          {
            "part": "B_E140",
            "distance_from_head_mm": [
              15.465377826930371,
              41.66503582693037
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "B_E141",
            "distance_from_head_mm": [
              114.47634336900964,
              140.67599936900965
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF39_CENTRAL",
            "distance_from_head_mm": [
              66.07068909797,
              90.07068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_INNER_-1_0_FLAT0",
            "distance_from_head_mm": [
              54.57068909797,
              66.07068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_-1_0_BEVEL",
            "distance_from_head_mm": [
              41.665034826930366,
              54.57068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF39_OUTER_-1_0",
            "distance_from_head_mm": [
              3.0000030979700085,
              15.465377826930371
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_1_0_FLAT0",
            "distance_from_head_mm": [
              90.07068909797,
              101.57068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_1_0_BEVEL",
            "distance_from_head_mm": [
              101.57068909797,
              114.47634236900964
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF39_OUTER_1_0",
            "distance_from_head_mm": [
              140.67599836900965,
              153.14137509797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF39_UPPER1",
        "kind": "foot_bolt",
        "d": 12.0,
        "length": 220,
        "grip": 198.14137819594,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 49.0,
        "min_smooth_shank_mm": 162.25,
        "tip_protrusion_mm": 5.058621804059992,
        "nominal_clamped_stack_mm": 204.14137819594,
        "nominal_clamp_margin_mm": 33.14137819594001,
        "layers": [
          {
            "part": "B_E140",
            "distance_from_head_mm": [
              15.465380826930371,
              41.665034826930366
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "B_E141",
            "distance_from_head_mm": [
              162.47634336900964,
              188.67599236900963
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF39_CENTRAL",
            "distance_from_head_mm": [
              90.07068909797,
              114.07068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_INNER_-1_1_FLAT0",
            "distance_from_head_mm": [
              78.57068909797,
              90.07068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_-1_1_FLAT1",
            "distance_from_head_mm": [
              54.57068909797,
              78.57068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_-1_1_BEVEL",
            "distance_from_head_mm": [
              41.66503982693037,
              54.57068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF39_OUTER_-1_1",
            "distance_from_head_mm": [
              3.0000030979700085,
              15.465385826930373
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_1_1_FLAT0",
            "distance_from_head_mm": [
              114.07068909797,
              125.57068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_1_1_FLAT1",
            "distance_from_head_mm": [
              125.57068909797,
              149.57068909797
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_1_1_BEVEL",
            "distance_from_head_mm": [
              149.57068909797,
              162.47633736900963
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF39_OUTER_1_1",
            "distance_from_head_mm": [
              188.67599436900963,
              201.14137509797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF39_UPPER2",
        "kind": "foot_bolt",
        "d": 12.0,
        "length": 280.0,
        "grip": 246.14137819594,
        "standard": "DIN933 8.8, fully threaded",
        "nominal_thread_length_mm": 280.0,
        "min_smooth_shank_mm": 0.0,
        "tip_protrusion_mm": 17.058621804059992,
        "nominal_clamped_stack_mm": 252.14137819594,
        "nominal_clamp_margin_mm": 252.14137819594,
        "layers": [
          {
            "part": "B_E140",
            "distance_from_head_mm": [
              15.465379826930373,
              41.66504082693038
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "B_E141",
            "distance_from_head_mm": [
              210.47633736900963,
              236.6760003690096
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF39_CENTRAL",
            "distance_from_head_mm": [
              114.07068909797,
              138.07068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF39_INNER_-1_2_FLAT0",
            "distance_from_head_mm": [
              102.57068909797,
              114.07068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_-1_2_FLAT1",
            "distance_from_head_mm": [
              78.57068909797,
              102.57068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_-1_2_FLAT2",
            "distance_from_head_mm": [
              54.57068909797,
              78.57068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_-1_2_BEVEL",
            "distance_from_head_mm": [
              41.66502982693038,
              54.57068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF39_OUTER_-1_2",
            "distance_from_head_mm": [
              3.0000030979700085,
              15.465376826930381
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_1_2_FLAT0",
            "distance_from_head_mm": [
              138.07068909797,
              149.57068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_1_2_FLAT1",
            "distance_from_head_mm": [
              149.57068909797,
              173.57068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_1_2_FLAT2",
            "distance_from_head_mm": [
              173.57068909797,
              197.57068909797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF39_INNER_1_2_BEVEL",
            "distance_from_head_mm": [
              197.57068909797,
              210.47634736900963
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF39_OUTER_1_2",
            "distance_from_head_mm": [
              236.6760023690096,
              249.14137509797
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF39_SUPPORT_TIE0",
        "kind": "support_bolt",
        "d": 12.0,
        "length": 150,
        "grip": 120.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 105.25,
        "tip_protrusion_mm": 13.2,
        "nominal_clamped_stack_mm": 126.0,
        "nominal_clamp_margin_mm": 12.0,
        "layers": [
          {
            "part": "RF39_CENTRAL",
            "distance_from_head_mm": [
              51.0,
              75.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              27.0,
              51.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              3.0,
              27.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_1_L1",
            "distance_from_head_mm": [
              75.0,
              99.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_1_L2",
            "distance_from_head_mm": [
              99.0,
              123.0
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF39_SUPPORT_TIE1",
        "kind": "support_bolt",
        "d": 12.0,
        "length": 150,
        "grip": 120.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 105.25,
        "tip_protrusion_mm": 13.2,
        "nominal_clamped_stack_mm": 126.0,
        "nominal_clamp_margin_mm": 12.0,
        "layers": [
          {
            "part": "RF39_CENTRAL",
            "distance_from_head_mm": [
              51.0,
              75.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              27.0,
              51.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              3.0,
              27.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_1_L1",
            "distance_from_head_mm": [
              75.0,
              99.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_1_L2",
            "distance_from_head_mm": [
              99.0,
              123.0
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF39_BASE_TIE0",
        "kind": "plate_bolt",
        "d": 12.0,
        "length": 160.0,
        "grip": 130.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 115.25,
        "tip_protrusion_mm": 14.2,
        "nominal_clamped_stack_mm": 135.0,
        "nominal_clamp_margin_mm": 11.0,
        "layers": [
          {
            "part": "RF39_CENTRAL",
            "distance_from_head_mm": [
              55.5,
              79.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              31.5,
              55.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              7.5,
              31.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_1_L1",
            "distance_from_head_mm": [
              79.5,
              103.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_1_L2",
            "distance_from_head_mm": [
              103.5,
              127.5
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF39_ANGLE_-1",
            "distance_from_head_mm": [
              2.5,
              7.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_ANGLE_1",
            "distance_from_head_mm": [
              127.5,
              132.5
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF39_BASE_TIE1",
        "kind": "plate_bolt",
        "d": 12.0,
        "length": 160.0,
        "grip": 130.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 115.25,
        "tip_protrusion_mm": 14.2,
        "nominal_clamped_stack_mm": 135.0,
        "nominal_clamp_margin_mm": 11.0,
        "layers": [
          {
            "part": "RF39_CENTRAL",
            "distance_from_head_mm": [
              55.5,
              79.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              31.5,
              55.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              7.5,
              31.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_1_L1",
            "distance_from_head_mm": [
              79.5,
              103.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_SUPPORT_1_L2",
            "distance_from_head_mm": [
              103.5,
              127.5
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF39_ANGLE_-1",
            "distance_from_head_mm": [
              2.5,
              7.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF39_ANGLE_1",
            "distance_from_head_mm": [
              127.5,
              132.5
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF40_UPPER0",
        "kind": "foot_bolt",
        "d": 12.0,
        "length": 180,
        "grip": 150.14137819593998,
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        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 135.25,
        "tip_protrusion_mm": 13.05862180406002,
        "nominal_clamped_stack_mm": 156.14137819593998,
        "nominal_clamp_margin_mm": 12.141378195939978,
        "layers": [
          {
            "part": "B_E145",
            "distance_from_head_mm": [
              15.4653778269303,
              41.6650358269303
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "B_E146",
            "distance_from_head_mm": [
              114.47634336900957,
              140.67599936900956
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF40_CENTRAL",
            "distance_from_head_mm": [
              66.07068909796993,
              90.07068909796993
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_INNER_-1_0_FLAT0",
            "distance_from_head_mm": [
              54.57068909796993,
              66.07068909796993
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_-1_0_BEVEL",
            "distance_from_head_mm": [
              41.665034826930295,
              54.57068909796993
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF40_OUTER_-1_0",
            "distance_from_head_mm": [
              3.0000030979699375,
              15.4653778269303
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_1_0_FLAT0",
            "distance_from_head_mm": [
              90.07068909796993,
              101.57068909796993
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_1_0_BEVEL",
            "distance_from_head_mm": [
              101.57068909796993,
              114.47634236900956
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF40_OUTER_1_0",
            "distance_from_head_mm": [
              140.67599836900956,
              153.14137509796993
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF40_UPPER1",
        "kind": "foot_bolt",
        "d": 12.0,
        "length": 220,
        "grip": 198.14137819593998,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 49.0,
        "min_smooth_shank_mm": 162.25,
        "tip_protrusion_mm": 5.058621804060021,
        "nominal_clamped_stack_mm": 204.14137819593998,
        "nominal_clamp_margin_mm": 33.14137819593998,
        "layers": [
          {
            "part": "B_E145",
            "distance_from_head_mm": [
              15.465380826930314,
              41.66503482693031
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "B_E146",
            "distance_from_head_mm": [
              162.47634336900958,
              188.67599236900958
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF40_CENTRAL",
            "distance_from_head_mm": [
              90.07068909796995,
              114.07068909796995
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_INNER_-1_1_FLAT0",
            "distance_from_head_mm": [
              78.57068909796995,
              90.07068909796995
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_-1_1_FLAT1",
            "distance_from_head_mm": [
              54.57068909796995,
              78.57068909796995
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_-1_1_BEVEL",
            "distance_from_head_mm": [
              41.66503982693031,
              54.57068909796995
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF40_OUTER_-1_1",
            "distance_from_head_mm": [
              3.0000030979699517,
              15.465385826930316
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_1_1_FLAT0",
            "distance_from_head_mm": [
              114.07068909796995,
              125.57068909796995
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_1_1_FLAT1",
            "distance_from_head_mm": [
              125.57068909796995,
              149.57068909796993
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_1_1_BEVEL",
            "distance_from_head_mm": [
              149.57068909796993,
              162.47633736900957
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF40_OUTER_1_1",
            "distance_from_head_mm": [
              188.67599436900957,
              201.14137509796996
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF40_UPPER2",
        "kind": "foot_bolt",
        "d": 12.0,
        "length": 280.0,
        "grip": 246.14137819593998,
        "standard": "DIN933 8.8, fully threaded",
        "nominal_thread_length_mm": 280.0,
        "min_smooth_shank_mm": 0.0,
        "tip_protrusion_mm": 17.05862180406002,
        "nominal_clamped_stack_mm": 252.14137819593998,
        "nominal_clamp_margin_mm": 252.14137819593998,
        "layers": [
          {
            "part": "B_E145",
            "distance_from_head_mm": [
              15.465379826930317,
              41.66504082693032
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "B_E146",
            "distance_from_head_mm": [
              210.47633736900957,
              236.67600036900956
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF40_CENTRAL",
            "distance_from_head_mm": [
              114.07068909796995,
              138.07068909796993
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF40_INNER_-1_2_FLAT0",
            "distance_from_head_mm": [
              102.57068909796995,
              114.07068909796995
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_-1_2_FLAT1",
            "distance_from_head_mm": [
              78.57068909796995,
              102.57068909796995
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_-1_2_FLAT2",
            "distance_from_head_mm": [
              54.57068909796995,
              78.57068909796995
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_-1_2_BEVEL",
            "distance_from_head_mm": [
              41.66502982693032,
              54.57068909796995
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF40_OUTER_-1_2",
            "distance_from_head_mm": [
              3.0000030979699517,
              15.465376826930324
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_1_2_FLAT0",
            "distance_from_head_mm": [
              138.07068909796993,
              149.57068909796993
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_1_2_FLAT1",
            "distance_from_head_mm": [
              149.57068909796993,
              173.57068909796993
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_1_2_FLAT2",
            "distance_from_head_mm": [
              173.57068909796993,
              197.57068909796993
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF40_INNER_1_2_BEVEL",
            "distance_from_head_mm": [
              197.57068909796993,
              210.47634736900957
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          },
          {
            "part": "RF40_OUTER_1_2",
            "distance_from_head_mm": [
              236.67600236900955,
              249.14137509796996
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": true
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF40_SUPPORT_TIE0",
        "kind": "support_bolt",
        "d": 12.0,
        "length": 150,
        "grip": 120.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 105.25,
        "tip_protrusion_mm": 13.2,
        "nominal_clamped_stack_mm": 126.0,
        "nominal_clamp_margin_mm": 12.0,
        "layers": [
          {
            "part": "RF40_CENTRAL",
            "distance_from_head_mm": [
              51.0,
              75.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              27.0,
              51.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              3.0,
              27.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_1_L1",
            "distance_from_head_mm": [
              75.0,
              99.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_1_L2",
            "distance_from_head_mm": [
              99.0,
              123.0
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF40_SUPPORT_TIE1",
        "kind": "support_bolt",
        "d": 12.0,
        "length": 150,
        "grip": 120.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 105.25,
        "tip_protrusion_mm": 13.2,
        "nominal_clamped_stack_mm": 126.0,
        "nominal_clamp_margin_mm": 12.0,
        "layers": [
          {
            "part": "RF40_CENTRAL",
            "distance_from_head_mm": [
              51.0,
              75.0
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              27.0,
              51.0
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              3.0,
              27.0
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_1_L1",
            "distance_from_head_mm": [
              75.0,
              99.0
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_1_L2",
            "distance_from_head_mm": [
              99.0,
              123.0
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF40_BASE_TIE0",
        "kind": "plate_bolt",
        "d": 12.0,
        "length": 160.0,
        "grip": 130.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 115.25,
        "tip_protrusion_mm": 14.2,
        "nominal_clamped_stack_mm": 135.0,
        "nominal_clamp_margin_mm": 11.0,
        "layers": [
          {
            "part": "RF40_CENTRAL",
            "distance_from_head_mm": [
              55.5,
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            "fully_within_guaranteed_smooth_length": true,
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          },
          {
            "part": "RF40_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              31.5,
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              7.5,
              31.5
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_1_L1",
            "distance_from_head_mm": [
              79.5,
              103.5
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_1_L2",
            "distance_from_head_mm": [
              103.5,
              127.5
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF40_ANGLE_-1",
            "distance_from_head_mm": [
              2.5,
              7.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_ANGLE_1",
            "distance_from_head_mm": [
              127.5,
              132.5
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      },
      {
        "id": "RF40_BASE_TIE1",
        "kind": "plate_bolt",
        "d": 12.0,
        "length": 160.0,
        "grip": 130.0,
        "standard": "DIN931 8.8",
        "nominal_thread_length_mm": 36.0,
        "min_smooth_shank_mm": 115.25,
        "tip_protrusion_mm": 14.2,
        "nominal_clamped_stack_mm": 135.0,
        "nominal_clamp_margin_mm": 11.0,
        "layers": [
          {
            "part": "RF40_CENTRAL",
            "distance_from_head_mm": [
              55.5,
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_-1_L1",
            "distance_from_head_mm": [
              31.5,
              55.5
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_-1_L2",
            "distance_from_head_mm": [
              7.5,
              31.5
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_1_L1",
            "distance_from_head_mm": [
              79.5,
              103.5
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            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_SUPPORT_1_L2",
            "distance_from_head_mm": [
              103.5,
              127.5
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            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          },
          {
            "part": "RF40_ANGLE_-1",
            "distance_from_head_mm": [
              2.5,
              7.5
            ],
            "fully_within_guaranteed_smooth_length": true,
            "normal_contact_only": false
          },
          {
            "part": "RF40_ANGLE_1",
            "distance_from_head_mm": [
              127.5,
              132.5
            ],
            "fully_within_guaranteed_smooth_length": false,
            "normal_contact_only": false
          }
        ],
        "nominal_projected_pressure_note": "F/(12*t) is a demand proxy only. A full thread is not a smooth dowel bearing surface."
      }
    ],
    "spacer_groups": [
      {
        "foot": "37",
        "side": 1,
        "level": 0,
        "z_mm": 220.0,
        "centre_gap_mm": 24.40565333145436,
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          "RF37_INNER_1_0_FLAT0",
          "RF37_INNER_1_0_BEVEL"
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        "outer": "RF37_OUTER_1_0",
        "minimum_inner_thickness_mm": 3.440275712262199,
        "maximum_inner_thickness_mm": 22.371030950646514,
        "washer_contact_area_mm2": 942.4777960769379,
        "minimum_inner_thickness_over_D37_D13_mm": 4.805589107570485,
        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308279
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      {
        "foot": "37",
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          "RF37_INNER_1_1_BEVEL"
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        "outer": "RF37_OUTER_1_1",
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        "maximum_inner_thickness_mm": 22.371030950646528,
        "washer_contact_area_mm2": 942.4777960769379,
        "minimum_inner_thickness_over_D37_D13_mm": 4.805589107570478,
        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308293
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      {
        "foot": "37",
        "side": 1,
        "level": 2,
        "z_mm": 329.8719873395505,
        "centre_gap_mm": 72.40565333145437,
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          "RF37_INNER_1_2_FLAT1",
          "RF37_INNER_1_2_FLAT2",
          "RF37_INNER_1_2_BEVEL"
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        "outer": "RF37_OUTER_1_2",
        "minimum_inner_thickness_mm": 3.440275712262192,
        "maximum_inner_thickness_mm": 22.371030950646528,
        "washer_contact_area_mm2": 942.4777960769379,
        "minimum_inner_thickness_over_D37_D13_mm": 4.8055891075704995,
        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308279
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      {
        "foot": "37",
        "side": -1,
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        "z_mm": 220.0,
        "centre_gap_mm": 24.40565333145436,
        "inner_layers": [
          "RF37_INNER_-1_0_FLAT0",
          "RF37_INNER_-1_0_BEVEL"
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        "outer": "RF37_OUTER_-1_0",
        "minimum_inner_thickness_mm": 3.440275712262199,
        "maximum_inner_thickness_mm": 22.371030950646514,
        "washer_contact_area_mm2": 942.4777960769379,
        "minimum_inner_thickness_over_D37_D13_mm": 4.805589107570485,
        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308279
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      {
        "foot": "37",
        "side": -1,
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        "z_mm": 274.93599366977526,
        "centre_gap_mm": 48.40565333145435,
        "inner_layers": [
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          "RF37_INNER_-1_1_FLAT1",
          "RF37_INNER_-1_1_BEVEL"
        ],
        "outer": "RF37_OUTER_-1_1",
        "minimum_inner_thickness_mm": 3.440275712262199,
        "maximum_inner_thickness_mm": 22.371030950646528,
        "washer_contact_area_mm2": 942.4777960769379,
        "minimum_inner_thickness_over_D37_D13_mm": 4.805589107570478,
        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308293
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      {
        "foot": "37",
        "side": -1,
        "level": 2,
        "z_mm": 329.8719873395505,
        "centre_gap_mm": 72.40565333145437,
        "inner_layers": [
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          "RF37_INNER_-1_2_BEVEL"
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        "outer": "RF37_OUTER_-1_2",
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        "minimum_inner_thickness_over_D37_D13_mm": 4.8055891075704995,
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      {
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        "outer": "RF38_OUTER_1_0",
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        "maximum_inner_thickness_mm": 22.371030950646514,
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        "minimum_inner_thickness_over_D37_D13_mm": 4.805589107570485,
        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308279
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        "outer": "RF38_OUTER_1_1",
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        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308279
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      {
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        "maximum_inner_thickness_mm": 22.371030950646514,
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        "minimum_inner_thickness_over_D37_D13_mm": 4.805589107570485,
        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308279
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        "outer": "RF38_OUTER_-1_1",
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        "maximum_inner_thickness_mm": 22.371030950646528,
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        "minimum_inner_thickness_over_D37_D13_mm": 4.805589107570478,
        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308293
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      {
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        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308279
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      {
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        "outer": "RF39_OUTER_-1_0",
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        "maximum_inner_thickness_mm": 22.371030950646514,
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      {
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        "outer": "RF39_OUTER_-1_1",
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      {
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        "outer": "RF39_OUTER_1_0",
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        "minimum_inner_thickness_over_D37_D13_mm": 4.805589107570485,
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        "maximum_inner_thickness_mm": 22.371030950646528,
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        "minimum_inner_thickness_over_D37_D13_mm": 4.8055891075704995,
        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308279
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      {
        "foot": "40",
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        "outer": "RF40_OUTER_-1_0",
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        "minimum_inner_thickness_over_D37_D13_mm": 4.8055891075704285,
        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308265
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      {
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        "outer": "RF40_OUTER_-1_1",
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        "minimum_inner_thickness_over_D37_D13_mm": 4.805589107570421,
        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308293
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      {
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        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308279
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      {
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        "centre_gap_mm": 24.405653331454396,
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        "minimum_inner_thickness_over_D37_D13_mm": 4.805589107570523,
        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308288
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      {
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        "maximum_inner_thickness_mm": 22.371030950646542,
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        "minimum_inner_thickness_over_D37_D13_mm": 4.805589107570523,
        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308267
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      {
        "foot": "40",
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        "centre_gap_mm": 72.40565333145437,
        "inner_layers": [
          "RF40_INNER_1_2_FLAT0",
          "RF40_INNER_1_2_FLAT1",
          "RF40_INNER_1_2_FLAT2",
          "RF40_INNER_1_2_BEVEL"
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        "outer": "RF40_OUTER_1_2",
        "minimum_inner_thickness_mm": 3.4402757122622205,
        "maximum_inner_thickness_mm": 22.371030950646556,
        "washer_contact_area_mm2": 942.4777960769379,
        "minimum_inner_thickness_over_D37_D13_mm": 4.805589107570501,
        "minimum_outer_thickness_over_D37_D13_mm": 4.365313395308309
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    ],
    "all_replacement_stock24": true,
    "all_layers_intersect_at_least_one_retaining_bolt": true,
    "retention_scope": "Circular flat spacers may rotate without changing shape. One bolt retains an inclined pad against loss but does not itself prevent rotation; full seating of both nonparallel faces, orientation mark and cyclic contact qualification remain required.",
    "dry_layer_capacity": "Compression only; no equal split, monolithic EI, glue, friction or automatic transverse bolt foundation."
  },
  "wood_checks": {
    "direction_count": 7344,
    "selected_net_count": 117,
    "detail_file": "wood_demands.json",
    "status": "geometry_and_demands_only_no_plywood_capacity_claim"
  },
  "independent_global_balance": {
    "projected_area_m2": 19.267057780159718,
    "source_snow_intensity_kPa": 1.5,
    "snow_factor": 1.4,
    "unfactored_snow_kN": 28.900586670239576,
    "snow_component_kN": 40.46082133833541,
    "total_vertical_reaction_kN": 47.33063822926168,
    "other_gravity_component_kN": 6.869816890926273,
    "four_foot_vertical_reactions_kN": [
      11.832659557315454,
      11.832659557315452,
      11.832659557315054,
      11.832659557315724
    ],
    "force_residual_N": [
      -6.657501216977835e-10,
      2.2009771782904863e-10,
      6.984919309616089e-10
    ],
    "note": "Independent triangle areas and direct support-force sum. These are the unchanged baseline loads, not the lighter candidate global analysis."
  },
  "summary": [
    {
      "mode": "stage4_reference",
      "load_basis": "normative_mean_wind_component_with_aerodynamic_analogy_not_complete_wind",
      "foot_cases": 48,
      "leg_cases": 96,
      "without_inner_pads_no_equilibrium": 96,
      "with_pads_no_equilibrium": 0,
      "coupled_pin_lower_bound_MPa": 3473.017525705908,
      "coupled_selected_VM_MPa": 4854.513027863099,
      "coupled_worst": {
        "mode": "stage4_reference",
        "roof_alpha": null,
        "case": "SP20_mean_wind_component_3",
        "load_basis": "normative_mean_wind_component_with_aerodynamic_analogy_not_complete_wind",
        "foot": "37"
      },
      "max_washer_pressure_MPa": 3.9636844555515536
    },
    {
      "mode": "stage4_reference",
      "load_basis": "research_envelope",
      "foot_cases": 216,
      "leg_cases": 432,
      "without_inner_pads_no_equilibrium": 360,
      "with_pads_no_equilibrium": 0,
      "coupled_pin_lower_bound_MPa": 4382.294729141678,
      "coupled_selected_VM_MPa": 6198.190267259312,
      "coupled_worst": {
        "mode": "stage4_reference",
        "roof_alpha": null,
        "case": "ULS_snow_wind_3",
        "load_basis": "research_envelope",
        "foot": "37"
      },
      "max_washer_pressure_MPa": 6.752346297180057
    },
    {
      "mode": "stage4_reference",
      "load_basis": "self_weight",
      "foot_cases": 12,
      "leg_cases": 24,
      "without_inner_pads_no_equilibrium": 24,
      "with_pads_no_equilibrium": 0,
      "coupled_pin_lower_bound_MPa": 346.0214223761681,
      "coupled_selected_VM_MPa": 480.17737909626806,
      "coupled_worst": {
        "mode": "stage4_reference",
        "roof_alpha": null,
        "case": "G",
        "load_basis": "self_weight",
        "foot": "40"
      },
      "max_washer_pressure_MPa": 0.325677830555951
    },
    {
      "mode": "stage4_reference",
      "load_basis": "snow_coefficients_with_shape_assumptions",
      "foot_cases": 132,
      "leg_cases": 264,
      "without_inner_pads_no_equilibrium": 264,
      "with_pads_no_equilibrium": 0,
      "coupled_pin_lower_bound_MPa": 3082.9085241567386,
      "coupled_selected_VM_MPa": 4363.2736917071,
      "coupled_worst": {
        "mode": "stage4_reference",
        "roof_alpha": 0.3,
        "case": "ULS_dome3_2",
        "load_basis": "snow_coefficients_with_shape_assumptions",
        "foot": "39"
      },
      "max_washer_pressure_MPa": 3.5437690998121245
    },
    {
      "mode": "pin_hinge_Y",
      "load_basis": "normative_mean_wind_component_with_aerodynamic_analogy_not_complete_wind",
      "foot_cases": 48,
      "leg_cases": 96,
      "without_inner_pads_no_equilibrium": 96,
      "with_pads_no_equilibrium": 0,
      "coupled_pin_lower_bound_MPa": 461.5219522608065,
      "coupled_selected_VM_MPa": 653.5532996712084,
      "coupled_worst": {
        "mode": "pin_hinge_Y",
        "roof_alpha": 0.3,
        "case": "SP20_mean_wind_component_0",
        "load_basis": "normative_mean_wind_component_with_aerodynamic_analogy_not_complete_wind",
        "foot": "38"
      },
      "max_washer_pressure_MPa": 9.381952291848869
    },
    {
      "mode": "pin_hinge_Y",
      "load_basis": "research_envelope",
      "foot_cases": 216,
      "leg_cases": 432,
      "without_inner_pads_no_equilibrium": 360,
      "with_pads_no_equilibrium": 0,
      "coupled_pin_lower_bound_MPa": 1244.0047936099918,
      "coupled_selected_VM_MPa": 1769.1681714440524,
      "coupled_worst": {
        "mode": "pin_hinge_Y",
        "roof_alpha": 0.3,
        "case": "ULS_wind_only_1",
        "load_basis": "research_envelope",
        "foot": "38"
      },
      "max_washer_pressure_MPa": 13.094488731909946
    },
    {
      "mode": "pin_hinge_Y",
      "load_basis": "self_weight",
      "foot_cases": 12,
      "leg_cases": 24,
      "without_inner_pads_no_equilibrium": 24,
      "with_pads_no_equilibrium": 0,
      "coupled_pin_lower_bound_MPa": 24.727335775573653,
      "coupled_selected_VM_MPa": 34.83454326734436,
      "coupled_worst": {
        "mode": "pin_hinge_Y",
        "roof_alpha": 0.3,
        "case": "G",
        "load_basis": "self_weight",
        "foot": "37"
      },
      "max_washer_pressure_MPa": 0.7144160489300809
    },
    {
      "mode": "pin_hinge_Y",
      "load_basis": "snow_coefficients_with_shape_assumptions",
      "foot_cases": 132,
      "leg_cases": 264,
      "without_inner_pads_no_equilibrium": 264,
      "with_pads_no_equilibrium": 0,
      "coupled_pin_lower_bound_MPa": 267.72314852084446,
      "coupled_selected_VM_MPa": 378.2660462373959,
      "coupled_worst": {
        "mode": "pin_hinge_Y",
        "roof_alpha": 0.3,
        "case": "ULS_dome3_2",
        "load_basis": "snow_coefficients_with_shape_assumptions",
        "foot": "38"
      },
      "max_washer_pressure_MPa": 6.886920127424963
    }
  ],
  "checks": {
    "max_force_residual_N": 4.1382008930668235e-11,
    "max_moment_residual_Nmm": 4.3528600807131155e-09,
    "analytical_bolt_example": {
      "symmetric_uniform_three24_bolt_moment_Nmm": 9000.0,
      "analytical_F_times_3t_over8_Nmm": 9000.0,
      "terminal_force_residual_N": 0.0,
      "terminal_moment_residual_Nmm": 0.0
    }
  },
  "sources": {
    "bolt_dimensions": "https://eshop.boellhoff.de/out/media/pdf/ISO_4014_Stahl_8.8___en.pdf"
  },
  "limitations": [
    "The two saved foot kinematics and three roof alpha values are sensitivities, not measured stiffness. Current CAD hashes were checked before use.",
    "Snow intensity/factors are distinct from roof distribution analogies; research_envelope includes unnormalised +/-1kPa and imposed prestress. Do not merge them into a construction utilisation.",
    "Static minimax is only necessary equilibrium. The chosen allocation and linear central-hole pressure are not an elastic contact solution.",
    "A captured dry spacer restores compression on the inner face; its own translation/rotation and interlayer retention must be geometrically demonstrated. No tangential pad reaction or glue is assumed.",
    "All M12 bolt stresses use an explicit 9.6mm core comparison. No normative bolt yield check, plywood dowel resistance or splitting/rolling-shear capacity is declared.",
    "Bilateral bolt forces require an outer flat washer/pad AND positive inner face contact; deleting inner spacers violates that route in the listed cases.",
    "The 72mm parallel-cheek comparison covers only the local leg joint. It is not a complete replacement for the central-foot connection.",
    "Slab and anchor design are outside this task. Purchased lower angles are boundary components; their product resistance is not established here.",
    "New mass, new dry fits/clearances, actual mechanical contacts and finishing light increment require a new global solve; old forces are conditional demands only."
  ],
  "load_cases_file": "six_component_demands.json",
  "detail_file": "cases.json",
  "candidate_input": {
    "path": "build/r7_foot_revision/geometry/foot_analysis.json",
    "sha256": "24173701444d21f3b176ab822e871429ebc74b9657da1d3c7f812f71dc834a32",
    "frozen_path": "build/r7_foot_revision/structure/inputs/candidate_foot_24173701444d21f3.json"
  }
}