Aligning and coupling means for trenchduct

Details Aligning and coupling means for trenchduct Aligning and coupling means for trenchduct

1987-01-12

1990-03-06

Chilcot, Jr., Richard E.

Static structures (e.g., buildings)

Tensioned or flexed sheet facing

174 48, 4034051, 220 34, E04B 548

Patent

active

049054341

ABSTRACT:
A trench duct side rail having an upper section and a lower section, the upper section including a pair of spaced-apart downwardly extending legs and with the lower section being disposed between the legs. The upper and lower sections are axially off-set so that on one end of the side rail the upper section extends outwardly of the lower section and on the opposite end of the side rail the upper section extends inwardly of the lower section.

REFERENCES:
patent: 3204378 (1965-09-01), Stesser et al.
patent: 3593472 (1971-07-01), Bargar
patent: 3701837 (1972-10-01), Fork
patent: 3886702 (1975-06-01), Fork
patent: 4040755 (1977-08-01), Jorgensen et al.
patent: 4173382 (1979-11-01), Booty
patent: 4420091 (1983-12-01), Thorpe et al.
patent: 4637185 (1987-01-01), Bowman

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