OSHA 10-Hour Construction ReviewFocus Four HazardsMedium
A construction crew is using a scaffold to perform work on the exterior of a building. The scaffold is 18 feet high, and workers are using personal fall arrest systems. Which component of the fall arrest system is designed to absorb the kinetic energy generated during a fall, thereby reducing the impact force on the worker's body?
- AAnchorage point
- BSelf-retracting lifeline
- CFull body harness
- DShock-absorbing lanyard
Show answer & explanationAnswer & explanation
Correct answer: D. Shock-absorbing lanyard
The shock-absorbing lanyard contains a built-in mechanism, often a tear-away strap, that extends and tears to dissipate the energy of a fall. This significantly reduces the force transmitted to the worker's body, preventing severe injury.
Why the other options are wrong
- A. The anchorage point is a secure connection for the system but does not absorb energy.
- B. A self-retracting lifeline provides fall protection, but its primary function is to limit fall distance, not absorb energy in the same way a shock-absorbing lanyard does.
- C. The full body harness distributes fall forces but does not absorb the energy itself.
Shock-Absorbing Lanyard
A component of a personal fall arrest system designed to absorb the kinetic energy of a fall, thereby reducing the impact forces on the worker's body.
- Typically contains a tear-away strap.
- Extends during a fall to dissipate energy.
- Limits the force transmitted to the worker to safe levels (e.g., 1,800 lbs).
Memory trick: Anchors hold, harnesses hug, lanyards lessen, lifelines limit.