A scaffold platform is 28 feet above the ground. The platform is 6 feet wide. What is the minimum height required for guardrails on this scaffold?
Correct Answer
B) 42 inches
OSHA requires guardrails on scaffolds to be between 38 and 45 inches high, with 42 inches being the standard height. The height of the scaffold above ground doesn't change the guardrail height requirement.
Why This Is the Correct Answer
OSHA 29 CFR 1926.451(g)(4) specifies that guardrails on scaffolds must be between 38 and 45 inches in height, measured from the upper surface of the top rail to the floor or platform surface. The standard and most commonly required height is 42 inches. The height of the scaffold above ground level is irrelevant to the guardrail height requirement - guardrails must always be 42 inches high regardless of whether the scaffold is 10 feet or 100 feet above ground.
Why the Other Options Are Wrong
Option C: 48 inches
45 inches is at the maximum end of the acceptable range but exceeds the standard requirement. While not technically wrong, it's more than the minimum required height.
Option D: 39 inches
48 inches exceeds the maximum allowable height of 45 inches specified in OSHA regulations and would not be compliant.
Memory Technique
Remember '42' as the answer to life, the universe, and scaffold guardrails (reference to Hitchhiker's Guide to the Galaxy)
Reference Hint
OSHA 29 CFR 1926.451(g)(4) - Scaffolding standards, guardrail requirements section
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