Roof jack system
作者： Gordon Regular
DOI:
关键词:
摘要: A roof jack system that provides a safety barrier is conveniently installed upon and removed from pitched roof. The includes guard assembly releasably attachable to an auxiliary support of first embodiment the present invention secured existing jack. Alternatively, directly according second invention.
lens.org 参考文章(17)
Mark W. Reichel, Portable roof guard rail support device ,(1995)
Donald G. Rondeau, Combined staging bracket and double sided clamp back rail ,(1995)
Paul F. Bartholomew, Safety rail system for use during construction or maintenance repair of pitched roofs ,(1995)
Shaun E. Bitner, Leveling roof platform support ,(1998)
Maurice Shaffstall, Adjustable roof scaffold jack ,(1986)
Norman J. Cloutier, Charles M. Synder, Robert J. Cloutier, Roofers safety brace ,(1998)
James H. Myers, Safety guard apparatus ,(1990)
Greg Franco, Joseph M. Franco, Roof brace for supporting a scaffold platform ,(1993)
Roy L. Violet, Adjustable roofing jack ,(1991)
John F Probst, Safety barricade for a roof ,(1973)