Front plate for trench boxes

Details Front plate for trench boxes Front plate for trench boxes

1978-12-04

1980-05-13

Grosz, Alexander

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405283, E21D 500

Patent

active

042026490

ABSTRACT:
A front plate for trench boxes located at one end of a rectangular trench box and attached between a pair of spaced apart adjacent trench box walls. The front plate has a chisel edge smooth skin bottom with means to achieve attachment of the front plate to adjacent trench box walls. Vertical and horizontal structural members are structurally interrelated and attach to the bottom and the bottom extends beneath the lowermost horizontal structural element and includes the bottom closure plate closing on a plurality of spaced apart gusset plates extending in vertical planes below the lowermost horizontal structural member.

REFERENCES:
patent: 3543522 (1970-12-01), Torti
patent: 3912407 (1975-10-01), Heininger
patent: 3992887 (1976-11-01), Fisher
patent: 4090365 (1978-05-01), Nieber

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