1976-09-03
1977-11-29
Shapiro, Jacob
52293, E21D 512
Patent
active
040599647
ABSTRACT:
A sheeting installation system is provided for installing trench wall support sheeting during the excavation of trenches and the like. A rectangular frame is formed by a pair of sheeting support wall members which are secured to a pair of spreader members disposed at the opposite ends of the wall members. Each wall member has a modular construction and several vertically-disposed sheeting support slots which extend through the member from top to bottom. The slots are overlapped and each slot slidably receives a sheeting section which is driven into the earth so that it projects a distance beneath the bottom of the frame but still has a portion of its length remaining in the slot to provide cantilever support for the section against the force exerted by the walls of the trench. Since the slots in each wall member are overlapped, the sheeting sections will be driven into the earth in overlapping relationship. Spreader members of different lengths are utilized for trenches of different widths and trench wall side cutters may be provided on the frame. Locking means keep the sheeting sections retracted into the slots when the frame is moved.
REFERENCES:
patent: 3584465 (1971-06-01), Holl
patent: 3606757 (1971-09-01), DeWeese et al.
patent: 3916629 (1975-11-01), Thompson
patent: 4002035 (1977-01-01), Wright
Maikis Robert A.
Shapiro Jacob
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