Reference

Fall restraint keeps a worker from reaching the hazard; fall arrest catches a fall already in progress. This reference sets out the hierarchy, a side-by-side comparison, the anchorage rule OSHA actually enforces for restraint, how work positioning differs from both, and where restraint quietly stops being restraint on a real jobsite.

ANSI/ASSP Z359.14-2021 replaced the Class A and Class B self-retracting lifeline labels with Class 1 and Class 2 on August 1, 2023, and changed what the class measures: anchorage position, not stopping distance. Covers both classes side by side, why Class A does not convert to Class 1, and how edge rating differs from class.

Arresting the fall is only half the system: OSHA requires employers to provide for prompt rescue or assure self-rescue whenever personal fall arrest is used. This guide explains the duty in 1926.502(d)(20) and 1910.140(c)(21), what OSHA letters say about 911-based plans and suspension time, and how to build the capability.

Fall protection is required at different heights by work type: OSHA construction triggers at 6 feet and general industry at 4 feet, with separate thresholds for scaffolds, steel erection, and fixed ladders. This guide decodes every trigger under 29 CFR 1926.501 and 1910.28 and walks a worked example of assessing a site's fall hazards.

Tie off without enough room below you and the system stops you only after you have already hit the ground. This guide shows how to calculate fall clearance step by step - free fall, deceleration, worker height, D-ring shift, and safety factor - with worked numbers for a shock-absorbing lanyard versus an SRL under OSHA 1926.502.