Frame erection safety system and components thereof

作者: Gerald T. Whitmer

DOI:

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摘要: The specification discloses a removable safety system for construction workers which is mounted on an I beam provides cable hand hold to lanyard may be fastened. ends of the are terminated by special device that increases grip when load applied. installed at ground level and hoisted with as it positioned attachment building or bridge.

参考文章(1)
Jr. Jose Cordero, Structural steelworker's safety clamp ,(1976)