A construction project involves work above a daycare center. If the building height is 45 feet and workers are installing roofing materials, what type of fall protection is most appropriate?
Correct Answer
B) Personal fall arrest systems with full body harnesses
At 45 feet above ground with people below, personal fall arrest systems with full body harnesses provide the most reliable protection. The height and risk to others below make this the safest option.
Why This Is the Correct Answer
Personal fall arrest systems with full body harnesses are required for work at heights of 6 feet or more in construction, and at 45 feet, they provide the most reliable protection against falls. The presence of a daycare center below creates additional safety concerns for people on the ground, making the most secure fall protection system essential. Full body harnesses distribute forces across the body and connect to secure anchor points, preventing workers from hitting the ground or lower levels. This system provides active protection that moves with the worker, unlike passive systems that may have gaps in coverage.
Why the Other Options Are Wrong
Option A: Safety nets only
Safety nets alone are insufficient at 45 feet because they must be installed within 30 feet of the work surface to be effective, and even then, they don't prevent the initial fall which could cause injury or allow workers to fall outside the net area.
Option C: Warning lines and safety monitors
Warning lines and safety monitors are only acceptable on low-slope roofs (2:12 or less) and are considered a less protective system that relies on human monitoring rather than physical fall prevention, making them inadequate for this height and risk level.
Option D: Controlled access zones only
Controlled access zones are supplementary protection measures used in conjunction with other fall protection systems, not standalone protection, and they only control who can enter an area rather than preventing falls from occurring.
Memory Technique
Use 'HARNESS = HEIGHT' - when working at significant heights (especially over occupied areas), harnesses provide the highest level of protection and are almost always the correct answer.
Reference Hint
OSHA 29 CFR 1926 Subpart M - Fall Protection, specifically sections 1926.501 and 1926.502 covering fall protection requirements and systems
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