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A temporary edge guardrail is being checked before deck work resumes. What top-rail height is required for a conventional guardrail system?

Correct Answer

A) 42 in. plus or minus 3 in.

OSHA guardrail top edges are 42 in. plus or minus 3 in. above the walking or working level. Other choices use handrail heights, a rigid single number, or an overstatement not in the guardrail rule.

Answer Options
A
42 in. plus or minus 3 in.
B
30 in. plus or minus 3 in.
C
36 in. exactly
D
48 in. minimum

Why This Is the Correct Answer

OSHA guardrail top edges are 42 in. plus or minus 3 in. above the walking or working level. Other choices use handrail heights, a rigid single number, or an overstatement not in the guardrail rule.

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