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Vesnalui [34]
3 years ago
13

A pump jack scaffold must be fitted with two ______ gripping mechanisms to prevent slippage.

Physics
1 answer:
FromTheMoon [43]3 years ago
5 0
A pump jack scaffold must be fitted with two positive gripping mechanisms to prevent slippage. Pump jacks are a uniquely designed scaffold consisting of a platform supported by movable brackets on vertical poles. The brackets are designed to be raised and lowered in a manner similar to an automobile jack. It is important to make sure that pump jack brackets have two positive gripping mechanisms to prevent any failure or slippage. 
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