Method and apparatus for forming a trench
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United States of America Patent
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-
Feb 19, 1991
Grant Date -
N/A
app pub date -
Oct 2, 1987
filing date -
Oct 2, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for constructing a grate or solid covered trench is provided, having a 'Z' type frame made positionally adjustable by an adjustment slot and fastening means combination, and a trench-form construction achieving stability by means of a number of box-shaped bracings positioned along the trench-form sidewalls. The positions of the bracings are staggered to provide both a supporting surface to the frame and stability to the lower regions of the sidewalls.
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Cited Art Landscape
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