CSLB General Building (B)SafetyMedium
A contractor is setting up a supported scaffold. According to Cal/OSHA regulations, what is the maximum permissible height of a supported scaffold before it must be secured against swaying or tipping?
- A3 times its minimum base dimension
- B4 times its minimum base dimension
- C5 times its minimum base dimension
- D2 times its minimum base dimension
Show answer & explanationAnswer & explanation
Correct answer: B. 4 times its minimum base dimension
Cal/OSHA requires that a supported scaffold be restrained from swaying or tipping if its height exceeds four times its minimum base dimension. This ensures stability and prevents accidents.
Why the other options are wrong
- A. This ratio is too small and does not meet Cal/OSHA requirements for scaffold stability.
- C. This ratio is too large, indicating a scaffold that would already be dangerously unstable without securing.
- D. This ratio is too small and does not meet Cal/OSHA requirements for scaffold stability.
Cal/OSHA Scaffold Stability (Supported)
Supported scaffolds must be secured against swaying or tipping when their height exceeds four times their minimum base dimension.
- Applies to supported scaffolds
- Ratio is height to minimum base dimension
- Securing prevents swaying/tipping
Memory trick: Four-leaf clover for scaffold height, stability it will have.