Wire fabrics and structure – Fabrics
Patent
1981-02-12
1982-11-09
McQuade, John
Wire fabrics and structure
Fabrics
E04C 502
Patent
active
043580785
ABSTRACT:
The specification discloses fabric for use in reinforcing concrete pipe. The fabric includes a plurality of circumferential defining line strands and a plurality of transverse strands positioned in spaced, parallel relationship to each other and extending generally perpendicular to the circumferential defining line strands. The transverse strands are divided into a plurality of sets having lengths equal to the predetermined reinforcement cage circumference. The circumferential defining line strands are divided along their lengths into quadrant defining portions. Additional reinforcement is provided at the quadrants wherein the areas of maximum stress will occur in the concrete pipe. The reinforcement may take the form of additional circumferential strands secured to the circumferential or transverse defining strands, a separate quadrant mat or fabric segment secured to the fabric, or the circumferential defining line strands may have an increased diameter at the desired quadrants in order to increase the steel area of the cage in the area of maximum stress that occur in the concrete pipe.
REFERENCES:
patent: 3425900 (1969-02-01), Purdy
patent: 3840054 (1974-10-01), Tolliver
patent: 3990480 (1976-11-01), Borodin et al.
patent: 4079500 (1978-03-01), Tolliver
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