Shaped frame material for use in forming pit frames

Details Shaped frame material for use in forming pit frames Shaped frame material for use in forming pit frames

1980-05-08

1982-03-16

Bell, J. Karl

Static structures (e.g., buildings)

Tensioned or flexed sheet facing

220 34, E04B 548

Patent

active

043194389

ABSTRACT:
A multi-purpose shaped frame material for use in forming pit frames, which can be used in three modes in accordance with the structure of a pit, which is used for wiring, piping, draining and ventilation, the material of which a lid member is made, and the thickness of the lid member. The shaped frame material comprises a first support member having first and second flat supporting surfaces on the front and rear sides thereof, respectively; a second support member formed integrally with and extended at right angles from one end portion of the first support member, and having a substantially cross-sectionally C-shaped lengthwise-extended recess in the front side thereof and a third flat supporting surface on the rear side thereof; and a vertical edge member formed integrally with and extended at right angles from the other end portion of the first support member, the height of the vertical edge member measured from the first supporting surface, the height of the first support member measured from the second supporting surface and the height of the second support member measured from the third supporting surface being differnt from one another.

REFERENCES:
patent: 3262238 (1966-07-01), Fork
patent: 3318476 (1967-05-01), Clark
patent: 3494381 (1970-02-01), Fork
patent: 3715844 (1973-02-01), Breading

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