Plastic and nonmetallic article shaping or treating: processes – Forming structural installations in situ – Arched – domed – or vertical-cylindrical structure
Patent
1981-08-03
1984-05-01
Murtagh, John E.
Plastic and nonmetallic article shaping or treating: processes
Forming structural installations in situ
Arched, domed, or vertical-cylindrical structure
52 2, 52741, 264240, 264255, 264256, 264250, 264314, 264333, E04B 116
Patent
active
044460830
ABSTRACT:
A technique for constructing inflated shell enclosures in which (1) cementing matrix and reinforcing material components are placed on an inflatable membrane before inflation except that one component, which is required for hardening the cementing matrix, is sprayed on after inflation, (2) the reinforcing material is a textile fabric, interbedded with the cementing matrix to form a laminate, and (3) the hardened shell can be lifted to a raised position for permanent support by removing anchorages at its perimeter used during inflation for hardening, and inflating the space between the hardened shell and the membrane, which reacts against a supporting base surface to lift the shell.
The fabric stretches slightly under inflation pressure so that shells having circular and polygonal perimeters, with center rises from one tenth to one fifth of the span, can be constructed with flat (untailored) fabrics. By tailoring the outer fabric and overlapping inner fabric layers anchored at one side only, rise/span ratios of about 1/3 are obtained without appreciable loss of uniformity in shell thickness.
Potential applications include roofs for grain and bulk storage containers, farm and industrial sheds and enclosures, and earth-bermed or earth-covered homes.
REFERENCES:
patent: 3057054 (1962-10-01), Barnes
patent: 3557515 (1971-01-01), MacCracken
patent: 3643910 (1972-02-01), Heifetz
patent: 3842550 (1974-10-01), Duquette
patent: 3922832 (1975-12-01), Dicker
patent: 4094109 (1978-06-01), Prouvost
patent: 4170093 (1979-10-01), Cappellini et al.
Ford Kathryn
Murtagh John E.
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