OSHA 10-Hour Construction ReviewFocus Four HazardsEasy
A construction crew is working on the third floor of a new building. They are installing structural steel beams and have created several unprotected floor openings for stairwells and elevator shafts. What is the minimum height above the lower level at which these floor openings require guarding?
- A10 feet
- B8 feet
- C4 feet
- D6 feet
Show answer & explanationAnswer & explanation
Correct answer: D. 6 feet
OSHA requires that all floor openings be guarded if they are 6 feet or more above the lower level to prevent falls. This standard applies to both temporary and permanent openings during construction.
Why the other options are wrong
- A. 10 feet is an incorrect height; guarding is required at a lower threshold.
- B. 8 feet is an incorrect height; guarding is required at a lower threshold.
- C. 4 feet is not the minimum height for guarding floor openings according to OSHA standards.
Floor Opening Guarding
OSHA requires that all floor openings on construction sites be guarded by a standard railing or cover if they are 6 feet (1.8 meters) or more above the lower level to prevent falls.
- Applies to temporary and permanent floor openings.
- Guardrails must meet specific strength and height requirements.
- Covers must be capable of supporting twice the maximum intended load.
Memory trick: Six feet means safety, or a fall you will meet!