Scaffolding Erection and Inspection Flashcards

Scaffold planks must extend beyond the support (end overhang) by a minimum of 6 inches and a maximum of:

Answer: 18 inches

OSHA requires scaffold planks to overhang supports by at least 6 inches but no more than 18 inches (unless cleated or restrained).

Under OSHA, toprails on scaffold guardrail systems must be between what heights above the platform?

Answer: 36–45 inches

OSHA 29 CFR 1926.451(g)(4) requires scaffold toprails to be between 38 and 45 inches above the platform surface.

What is the maximum vertical distance between supported scaffold tie-ins to the structure?

Answer: 26 feet

OSHA requires ties or guys at maximum 26-foot vertical intervals for tube-and-coupler and fabricated frame scaffolds.

When a scaffold is used for welding and cutting operations, what additional precaution is specifically required by OSHA?

Answer: Nonconducting insulation must be placed on or around the scaffold and in the vicinity of combustibles

OSHA requires that insulation be placed around the scaffold to protect against electric shock from welding current when welding from a scaffold.

What must a scaffold erector do before dismantling a scaffold that was erected by another contractor?

Answer: Review the original erection plan and have a competent person evaluate the scaffold's current condition

Before dismantling, the competent person must evaluate the scaffold's current condition and review any available erection plans to ensure safe dismantling sequence.

Suspension scaffold wire rope must be removed from service when a deficiency is found during inspection. Which deficiency alone requires immediate removal?

Answer: Six randomly distributed broken wires in one lay, or three broken wires in one strand in one rope lay

For suspension scaffold rope, 6 randomly distributed broken wires or 3 broken wires in one strand requires removal per OSHA and ASME standards.