Static structures (e.g. – buildings) – Specified wear or friction-type traffic-carrying surface – Perforate structure having twisted element or particular...
Patent
1986-11-14
1988-03-15
Ridgill, Jr., James L.
Static structures (e.g., buildings)
Specified wear or friction-type traffic-carrying surface
Perforate structure having twisted element or particular...
52483, 52507, 52581, E04C 242
Patent
active
047304243
ABSTRACT:
A walkway on a rooftop comprises expanded metal planks supported by U-shaped support stands disposed transversely with respect to the length of the planks. The planks have alternating rows of ridges and valleys, both of which have transverse slits. The planks are connected to the support stands by T-shaped bolts whose crossbars are rounded. The shanks of the T-bolts pass through the slits in the valleys and the crossbars nestle within the valleys in rotatably slidable engagement with the metal.
REFERENCES:
patent: 1105791 (1914-08-01), Irving
patent: 1105873 (1914-08-01), Berson
patent: 2322965 (1943-06-01), McNeil
patent: 3309119 (1967-03-01), Phillips
patent: 3466829 (1969-09-01), Robicheaux
patent: 4490065 (1984-12-01), Ullrich et al.
Green William J.
Semmerling Ralph P.
Didrick Robert M.
Ridgill, Jr. James L.
Robinson Robert H.
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