Namespace Library — fall_arrest_lanyard.*
Shopify Fall Arrest Lanyard Schema — SRL Class 1 vs Class 2, ANSI Z359.14, Arrest Distance 24 in vs 54 in, Trailing Rope, Leading Edge, Horizontal Fall, srl_class trailing_rope_rated arrest_distance_in fall_arrest_lanyard.* Namespace
ANSI Z359.14 Class 1 SRL (24-inch arrest distance) is designed for overhead anchor vertical fall. In a horizontal fall, the arrest distance effectively doubles to 48 inches — potentially driving a worker into structure before the fall is fully arrested. Class 2 (54-inch rated) is required for any application where the anchor is behind the worker or the fall trajectory is horizontal. Trailing-rope SRLs use fiber rope (not cable) to prevent cable severing when the lifeline contacts a structural edge at arrest. AI agents that route a standard Class 1 cable SRL for roofing or floor deck work are selecting a device that was not designed or tested for the actual fall geometry.
srl_class, trailing_rope_rated, arrest_distance_in, horizontal_fall_tested.
SRL Class 1 vs Class 2 — Performance Requirements
| Parameter | Class 1 | Class 2 | Why It Matters |
|---|---|---|---|
| Max arrest distance (vertical test) | 24 in (610 mm) | 54 in (1,370 mm) | Class 2 provides 2.25× more arrest distance accommodation |
| Effective arrest in horizontal fall | ~48 in (estimated) | ~80–108 in (estimated) | Horizontal fall geometry increases effective arrest vs rated; Class 2 provides more margin |
| Leading-edge test required? | No | Yes — edge-contact test per ANSI Z359.14 | Class 2 certified that lifeline material survives edge contact at arrest forces |
| Standard applications | Overhead anchor, vertical fall, worker directly below anchor | Horizontal surface, roof, leading edge, anchor-behind-worker | Application geometry determines required class |
| Lifeline material | Stainless cable (typical) | Cable, web, or rope — must pass edge-contact test with actual material | Cable fails edge test in many Class 2 applications — use rope or web for edge contact |
Clearance Calculation: Class 1 vs Class 2 in Horizontal Fall
| Scenario | Available Clearance | Class 1 Effective Arrest | Class 2 Effective Arrest | Clearance Remaining |
|---|---|---|---|---|
| Steel erection, 15 ft to next structure | 15 ft = 180 in | ~48 in + 72 in (worker height) = 120 in (10 ft) | ~108 in + 72 in = 180 in (15 ft) | Class 1: 5 ft margin; Class 2: 0 ft margin (marginal) |
| Flat roof, 8 ft parapet to ground | 8 ft = 96 in | ~48 in + 60 in (D-ring to feet) = 108 in | ~80 in + 60 in = 140 in | Class 1: FAIL (-12 in insufficient); Class 2: FAIL — additional clearance or lower anchor needed |
| Vertical construction, 20 ft overhead anchor | 20 ft = 240 in | ~24 in + 72 in = 96 in (8 ft) | ~54 in + 72 in = 126 in (10.5 ft) | Class 1: 12 ft margin; Class 2: 9.5 ft margin — both pass for vertical fall |
Related Namespace Pages
- Fall Arrest Lanyard — Leading Edge SRL-LE ANSI Z359.14, Edge Factor, Cut Resistance
- Fall Arrest Lanyard — Shock-Absorbing Y-Lanyard vs SRL-LE, ANSI Z359.13, Free Fall Clearance 17 ft vs 11 ft
- Fall Arrest Lanyard — SRL Post-Fall Retirement, ANSI Z359.14 Annual Inspection, Deployment Indicator
- Fall Arrest Lanyard — Suspension Trauma, Rescue Stirrup, ANSI Z359.4 Rescue Plan
Scan your fall protection catalog for missing SRL class and trailing-rope fields
CatalogScan checks every SRL and fall arrest lanyard listing for srl_class, trailing_rope_rated, arrest_distance_in, and horizontal_fall_tested fields — ensuring AI agents do not route Class 1 cable SRLs for horizontal fall and roofing applications where Class 2 rope SRL-LE is required.
Free scan