Prestressed plastic bodies and method of making same

Details Prestressed plastic bodies and method of making same Prestressed plastic bodies and method of making same

1985-06-10

1988-02-23

Thurlow, Jeffery

Static structures (e.g., buildings)

With component having discrete prestressing means

Beam, girder, or truss construction

29452, 52230, 52741, 264228, 264229, 264333, 264 406, 428349, 428379, 428390, B28B 130, B32B 1306, E04C 501, E04C 503

Patent

active

047261633

ABSTRACT:
A method of producing a compressive stress in a mass comprised of plastic material having a tendon therein, at least a portion of the length of the tendon being contained in thermoplastic material within the mass, the method comprising the steps of heating the tendon to a temperature sufficient to soften the thermoplastic material in an annular region surrounding the tendon, applying a tractive force to the heated tendon, thereby placing the heated tendon under tensile stress, and securing the heated tendon to the mass in a manner that causes the tensile force in the tendon to produce a compressive stress in the mass and prestressed plastic bodies produced according to this method.

REFERENCES:
patent: 2319105 (1943-05-01), Billner
patent: 2329189 (1943-09-01), Dill
patent: 2414011 (1947-01-01), Billner
patent: 2727293 (1955-12-01), Barnett et al.
patent: 3422586 (1969-01-01), Parma
patent: 3491431 (1970-01-01), Pewitt
patent: 3552074 (1971-01-01), Rajchman
patent: 3676968 (1972-07-01), Campbell
patent: 3960995 (1976-06-01), Kourkene
patent: 4499136 (1985-02-01), Nakamura et al.

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