Fiberglass structural member of layer construction and method of

Details Fiberglass structural member of layer construction and method of Fiberglass structural member of layer construction and method of

1979-10-10

1982-01-05

Murtagh, John E.

Static structures (e.g., buildings)

Tensioned or flexed sheet facing

523095, 52731, E04C 310, E04C 329

Patent

active

043087000

ABSTRACT:
A structural member such as a beam formed by an inner layer of fiberglass that is filament wound about a mandrel, a middle layer of fire retardant material such as gypsum board, and an outer layer of filament wound fiberglass. In addition to its fire retardant function, the middle layer acts as a spacer between the inner and outer layers, thereby rigidifying the beam. Tendons extend throughout the length of the beam internally. They are connected to the top of the beam near its ends and to the bottom of the beam at one or more intermediate points, thus tending to lift the middle of the beam to prevent sagging. The tension on these tendons may be selected to meet any of a variety of load conditions.

REFERENCES:
patent: 2922200 (1960-01-01), Atwood
patent: 3520749 (1970-07-01), Rubenstein
patent: 3742985 (1973-07-01), Rubenstein
patent: 3802975 (1974-04-01), Saidla
patent: 3830687 (1974-08-01), Carlore
Polyurethanes by Reinhold Publishing Corp. Reinhold Plastics Application Series, p. 67.

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