Question

Guardrails are often used by employers to protect workers from falls. How high must the top guardrail be above the working surface?

Answer 1

Under the 1910.23(e) (1) Osha says that optimal guardrail height must be 42 inches from the upper surface of the top rail to floor, platform, runway, or ramp level. So the answer to your question is 42 inches above the working Surface.