Plastic forms for poured concrete
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United States of America Patent
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Jun 23, 1992
Issued Date -
N/A
app pub date -
Apr 18, 1991
filing date -
Jun 21, 1990
priority date (Note) -
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Abstract
A hollow foamed plastic form for concrete has a pair of opposed parallel side walls with planar upper and lower faces, and a pair of opposed end members. Disposed on the upper and lower faces of the side walls are a series of elongated locking members, each composed of a pair of offset ribs having a trapezoidal or rectangular shape.
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