A lanyard fall-arrest system slows and eventually stops descent and absorbs the forces that could otherwise injure the worker.
Synthetic webbing
Synthetic rope
Shock absorbing
Self-retracting
The Correct Answer and Explanation is:
The correct answer is: Shock absorbing
Explanation (Approximately 300 words):
A lanyard fall-arrest system is a key component in personal fall protection systems (PFPS), designed to protect workers from injuries when working at heights. Among the various types of lanyards, the shock absorbing lanyard is specifically engineered to slow down and eventually stop a worker’s descent during a fall, while also reducing the force of impact on the worker’s body.
When a person falls, the gravitational pull causes a rapid acceleration, and without a mechanism to absorb this energy, the sudden stop at the end of the fall can cause serious injury—especially to the spine, internal organs, or limbs. This is where shock-absorbing lanyards come in. They are designed with built-in materials or devices that stretch or tear in a controlled manner during a fall. This controlled deceleration dissipates the kinetic energy generated by the fall, thereby reducing the impact force to a survivable level—typically keeping it below 1,800 pounds (8 kN), which is the OSHA requirement.
Let’s briefly compare the other options:
- Synthetic webbing: Refers to the material (like nylon or polyester) used in making harnesses or lanyards. While strong and durable, it does not, by itself, absorb shock.
- Synthetic rope: Similar to webbing in use, it’s another material option for lanyards, but again, it does not have built-in shock-absorbing features.
- Self-retracting: These devices (SRLs) automatically extend and retract as the worker moves. While some SRLs also reduce fall forces, the question specifies a lanyard, not a retracting lifeline.
In summary, among lanyard options, only shock absorbing lanyards are specifically designed to both slow descent and absorb harmful forces, making them the correct and safest choice for arresting a fall.