Fall Protection Clearance
Required clearance below anchor = free-fall + decel + worker height + harness stretch + safety factor.
Example
You enter
- Connector type shock-absorbing-lanyard-6ft
- Worker height (D-ring to feet, ft) 5
- Harness stretch (ft) 1
- Safety factor (ft) 1
- Actual clearance below anchor (ft) 18
You get
- Required clearance 16.5
- Remaining clearance 1.5 ft
- Free fall (ft) 6
- Decel (ft) 3.5
- Connector label 6 ft shock-absorbing lanyard
- Status PASS (clearance margin)
Details, formula, and sources
Pass/fail vs actual clearance to next lower level.
Required clearance = free-fall + decel + worker_height + harness_stretch + safety_factor. Compared against the user-entered actual clearance below the anchor. Negative remaining clearance flags FAIL.
OSHA 29 CFR 1926.502 (Fall protection systems criteria) by section. ANSI Z359 (Fall Protection and Fall Restraint) by name. Manufacturer connector-decel benchmarks from data/cross/fall-protection-benchmarks.json.
29 CFR 1926.502 free at ecfr.gov. ANSI Z359 licensed; manufacturer guides free at each manufacturer site.
Estimate. Engineer of record governs the design and acceptance. Verify against the project structural drawings and the manufacturer's published capacity / chart.
Field names used by the API: connector, worker_height_ft, harness_stretch_ft, safety_factor_ft, actual_clearance_ft, required_clearance_ft, remaining_clearance_ft, free_fall_ft, decel_ft, connector_label, flag
- Default free-fall 6 ft for personal fall arrest (PFAS)29 CFR 1926.502(d)(16)
- Default decel 3.5 ft for shock-absorbing lanyard / 1.0 ft for SRLmanufacturer typical
- Default worker height 5 ft from D-ring to feetengineering practice
- Default safety factor 1 ft marginengineering practice