Concrete unit prestressed using tendons stressed before concreti

Details Concrete unit prestressed using tendons stressed before concreti Concrete unit prestressed using tendons stressed before concreti

1976-07-09

1978-07-04

Hoffman, Drayton E.

Railways: surface track

Ties

Nonmetallic

52223R, 238 85, E01B 334

Patent

active

040984605

ABSTRACT:
A long concrete unit, prestressed by tendons tensioned before concreting, at least one section of which, near the end of the said unit, is submitted to maximum loads, characterized by the fact that at least one improved-bond prestressing tendon is surrounded by spirals located on either side of the zone of maximum tensile stress.

REFERENCES:
patent: 3062450 (1962-11-01), Hanff
patent: 3948010 (1976-04-01), Sonneville
patent: 3994436 (1976-11-01), Sonneville
American Steel & Wire, Div. of U.S. Steel Co., Cleveland Ohio, Sales Brochure dated 30 Mar. 1954, pp. 4 & 5.

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