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Stiffleg means a rigid member supporting the mast at the head.
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1910.181(b)(1) Materials Handling and Storage, Application
This section applies to guy, stiffleg, basket, breast, gin pole, Chicago boom and A-frame derricks of the stationary type, capable of handling loads ...
1910.181(a) Materials Handling and Storage, Definitions Applicable to This Section
A stiffleg derrick is a derrick similar to a guy derrick except that the mast is supported or held in place by two or more stiff ...
1910.181(b) Materials Handling and Storage, General Requirements
This section applies to guy, stiffleg, basket, breast, gin pole, Chicago boom and A-frame derricks of the stationary type, capable of handling loads ...
1910.181 Materials Handling and Storage, Derricks
A stiffleg derrick is a derrick similar to a guy derrick except that the mast is supported or held in place by two or more stiff ...