OSHA 10-Hour Construction ReviewTools - Hand and PowerHard
An experienced carpenter is using a power-actuated tool to drive fasteners into a structural steel beam. The tool misfires. According to OSHA regulations, what is the *first* action the carpenter should take?
- APoint the tool in a safe direction and wait at least 30 seconds before trying to refire or unload.
- BImmediately attempt to clear the jammed fastener from the tool.
- CEngage the tool's safety lock and hand it to a supervisor for inspection.
- DDisassemble the tool to inspect the firing pin for damage.
Show answer & explanationAnswer & explanation
Correct answer: A. Point the tool in a safe direction and wait at least 30 seconds before trying to refire or unload.
OSHA 1926.302(e)(11) states that if a powder-actuated tool misfires, the operator shall hold the tool in the operating position for at least 30 seconds before making an attempt to refire. This waiting period allows the propellant to fully burn off, preventing a delayed discharge (hang fire) while the tool is being handled or cleared, which could cause serious injury.
Why the other options are wrong
- B. Immediately attempting to clear a jammed fastener is extremely dangerous due to the risk of a delayed discharge (hang fire).
- C. While engaging the safety lock is good, handing it to a supervisor without the 30-second wait still exposes others to the hang fire risk.
- D. Disassembling the tool immediately is dangerous if a hang fire is possible; the 30-second wait is paramount.
Powder-Actuated Tool Misfire Procedure
In case of a powder-actuated tool misfire, hold the tool in the operating position, pointed in a safe direction, for at least 30 seconds before attempting to refire or unload.
- Prevents injury from a delayed discharge (hang fire).
- Allows propellant to fully burn off.
- Never immediately attempt to clear or disassemble a misfired tool.
Memory trick: Misfire? Wait 30, point safe, don't hate!