STSC Scaffolding Erection and Inspection 2

Question 1

What is the required minimum width of a scaffold platform on a supported scaffold?

Accepted Answer

18 inches

Answer

OSHA 29 CFR 1926.451(b)(2) requires scaffold platforms to be at least 18 inches wide.

Question 2

Scaffolds must be capable of supporting their own weight plus how many times the maximum intended load?

Accepted Answer

4 times

Answer

OSHA requires scaffolds to be capable of supporting 4 times the maximum intended load (with a 4:1 safety factor).

Question 3

When must scaffolds be inspected by a competent person?

Accepted Answer

Before each work shift and after any occurrence that could affect the scaffold's structural integrity

Answer

OSHA requires scaffold inspection before each shift and after any event that could affect structural integrity (storms, impacts, modifications).

Question 4

Access to scaffold platforms above 2 feet must be provided by:

Accepted Answer

Portable ladders, direct access from another scaffold or structure, stair towers, or integral prefabricated frames

Answer

OSHA requires safe access to scaffold platforms at all heights — specific acceptable access methods are prescribed.

Question 5

What is the minimum setback distance from a power line required for metal scaffolding?

Accepted Answer

10 feet

Answer

OSHA requires a minimum 10-foot horizontal clearance from energized power lines for metal scaffolds.

(STSC) Safety Trained Supervisor Construction Practice Test