Trench shoring assembly with force transferring accessory

Details Trench shoring assembly with force transferring accessory Trench shoring assembly with force transferring accessory

1976-02-09

1976-11-23

Shapiro, Jacob

52727, E21D 500

Patent

active

039928870

ABSTRACT:
This invention relates to a trench shoring assembly which includes a pair of spaced apart side walls for vertical disposition within a trench. Spreader pipes and spreader collars interconnect the side walls and allow limited pivotal movement between the wide walls. Each side wall includes outer and inner metal plates connected to a plurality of interconnected structural members which define a main frame. The interconnected structural members include horizontally extending hollow metal beams including a top beam which extends longitudinally along the top of the side wall, two intermediate beams parallel the hollow metal beam and a bottom beam. A hardwood insert is disposed within the top beam to prevent the collapse of the hollow metal beam. Each side wall contains a number of hollow beams extending perpendicularly to the horizontal beams and ribbed members extending perpendicularly to the horizontal beams. These vertical beams and members are interconnected by a strip member.

REFERENCES:
patent: 139903 (1873-06-01), Lummus
patent: 157920 (1874-12-01), Manes
patent: 1391624 (1921-09-01), Gardner
patent: 3750409 (1973-08-01), Orfei

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