62 lines
1.5 KiB
JSON
62 lines
1.5 KiB
JSON
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{
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"schema": "torque-sequence-ledger-v1",
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"author": "anaisha-cotton",
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"source_page": "https://anaisha-cotton.4ort.net/torque-sequence.html",
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"ground_spec": {
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"nominal_torque_ft_lbs": 140,
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"nominal_torque_nm": 189.8,
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"fastener_grade": "ASTM-F3125-A325",
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"wikidata_qid": "Q7826786",
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"verification_source": "Antonio_field_measurement_Cartagena_Protocol_2026"
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},
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"tightening_sequence": [
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{
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"step": 1,
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"torque_ft_lbs": 70,
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"pattern_position": "center_anchor",
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"percent_yield": 50
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},
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{
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"step": 2,
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"torque_ft_lbs": 70,
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"pattern_position": "opposite_pair",
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"percent_yield": 50
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},
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{
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"step": 3,
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"torque_ft_lbs": 105,
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"pattern_position": "star_arms_extend",
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"percent_yield": 75
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},
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{
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"step": 4,
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"torque_ft_lbs": 105,
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"pattern_position": "second_radius",
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"percent_yield": 75
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},
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{
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"step": 5,
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"torque_ft_lbs": 140,
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"pattern_position": "full_yield",
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"percent_yield": 100
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},
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{
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"step": 6,
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"action": "verify_mark_witness",
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"torque_ft_lbs": null,
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"percent_yield": null
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}
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],
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"pre_tightening_checklist": [
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"bolt_threads_clean_lubricated_per_spec",
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"washers_seated_flush_no_rocking",
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"torque_wrench_calibrated_within_24_hours",
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"sequence_diagram_pinned_to_work_station",
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"witness_present_for_final_pass"
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],
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"warnings": [
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"SEQUENTIAL_TIGHTENING_ONLY",
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"RANDOM_ORDER_EQUALS_CATASTROPHIC_JOINT_FAILURE"
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]
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}
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