According to 29 CFR 1926.451, what is the maximum gap allowed between scaffold planks or between a plank and the uprights?
Correct Answer
D) 1 inch
OSHA limits gaps between scaffold planks and between planks and uprights to 1 inch to prevent tools or materials from falling through and potentially injuring workers below.
Why This Is the Correct Answer
According to 29 CFR 1926.451(b)(3), OSHA specifically requires that gaps between scaffold planks and between planks and uprights not exceed 1 inch. This regulation is designed to prevent tools, materials, or debris from falling through the scaffold platform and potentially injuring workers below. The 1-inch maximum gap provides a balance between allowing for thermal expansion and material tolerances while maintaining worker safety. This is a critical safety requirement that general contractors must enforce on all scaffold installations.
Why the Other Options Are Wrong
Option A: 2 inches
2 inches is double the allowable gap and would create significant safety hazards for workers below the scaffold
Option B: 1.5 inches
1/2 inch is too restrictive and not the actual OSHA requirement, though it would be safer than the required standard
Memory Technique
Think 'ONE inch for everyone's safety' - the gap can't be bigger than your thumb width
Reference Hint
29 CFR 1926 Subpart L - Scaffolds, specifically section 1926.451(b)(3) for platform construction requirements
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