CHST - Construction Health and Safety Technician Scaffolding and Elevated Work Platforms Questions and Answers Flashcards

Under OSHA 29 CFR 1926.502, what is the minimum height at which personal fall arrest systems must be used on scaffolding when guardrails are not provided?

Answer: 6 feet

OSHA requires fall protection for scaffold workers at heights of 6 feet or more above a lower level when guardrails are not provided.

What is the OSHA-required minimum distance that a scaffold must be erected from an energized power line rated at 50 kV or less?

Answer: 10 feet

OSHA 1926.416 requires scaffolds to be erected at least 10 feet from energized power lines rated 50 kV or less.

Which type of scaffold relies solely on the building structure for support and has no legs, poles, or uprights?

Answer: Suspended scaffold

Suspended scaffolds hang from an overhead structure using ropes or other non-rigid means rather than being supported from below.

When using a two-point suspension scaffold (swing stage), what is the required safety factor for the supporting ropes?

Answer: 6 to 1

OSHA requires a minimum safety factor of 6:1 for suspension ropes on two-point adjustable suspension scaffolds.

A competent person inspects a scaffold and finds a plank with a split running along the grain for 18 inches. What is the correct action?

Answer: Remove and replace the plank immediately

Any scaffold plank with visible defects such as splits compromising structural integrity must be immediately removed from service.

What is the maximum allowable load per scaffold plank for a light-duty scaffold?

Answer: 25 pounds per square foot

OSHA defines light-duty scaffolds as those designed to carry a maximum of 25 pounds per square foot.

Which OSHA standard specifically governs scaffolding used in construction activities?

Answer: 29 CFR 1926 Subpart Q

OSHA's scaffolding requirements for construction are found in 29 CFR 1926 Subpart Q (Scaffolds).