Inspecting Pump Jack Scaffolds
A pump jack scaffold is a supported scaffold consisting of a platform supported by vertical poles and movable support brackets.
This worker is using a standard pump jack scaffold while installing siding.
When inspecting these scaffolds, check the following:
- Make sure brackets, braces and accessories for pump jack scaffolds are fabricated from metal plates and angles.
- Check that two positive gripping devices are being used for each bracket.
- Ensure poles are secured to structures by rigid triangular bracing or its equivalent at the bottom, top, and other points.
- Verify that when the platform is raised, crossbracing is added about 4 feet on the side opposite the pump jack brace and should be left in place until the pump jack has been moved and the initial brace has been reinstalled.
- If wood poles are used, make sure the lumber is straight-grained, free of shakes and large loose or dead knots and other imperfections that may reduce the strength of the wood.
- If two consecutive lengths are used to form the wood poles, make sure the poles are connected together with the seam parallel to the bracket.
- If two-by-four lumber is used to create a pole, make sure the splices are strong enough to maintain the full strength of the member.
- Make sure workbenches are not used as scaffold platforms.
Knowledge Check Choose the best answer for the question.
4-4. When inspecting a pump jack scaffold, check that brackets, braces, and accessories are fabricated from _____.
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