OSHA 10-Hour Construction ReviewTools - Hand and PowerMedium
A construction worker is operating a hydraulic jack to lift a heavy beam. After the beam has been raised to the desired height, what is the most important safety measure to take before working under or around the lifted load?
- APlacing a 'Do Not Operate' tag on the hydraulic jack.
- BMonitoring the hydraulic pressure gauge for fluctuations.
- CEnsuring the hydraulic fluid lines are free of leaks.
- DSecuring the load with appropriate blocking or cribbing.
Show answer & explanationAnswer & explanation
Correct answer: D. Securing the load with appropriate blocking or cribbing.
Once a load is lifted by a hydraulic jack, it must be immediately secured with blocking or cribbing. Hydraulic systems can fail, and relying solely on the jack to hold a load creates an extreme crushing hazard. Blocking provides a stable, mechanical support.
Why the other options are wrong
- A. Tagging is for lockout/tagout, not the primary method for securing a lifted load.
- B. Monitoring the gauge is useful, but it doesn't prevent a catastrophic failure if the system gives way; physical support does.
- C. Fluid line inspection is part of maintenance, but not the most important step *after* lifting to secure the load itself.
Hydraulic Lifted Load Support
Any load lifted by hydraulic equipment must be immediately and securely supported by appropriate blocking or cribbing once it reaches the desired height.
- Hydraulic systems can fail unexpectedly.
- Blocking provides a mechanical, non-hydraulic support.
- Prevents crushing injuries or fatalities.
Memory trick: Lift with power, support with wood, or it's no good!