F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
189/65
F16L 9/04 (2006.01) E04C 5/00 (2006.01) F16L 9/08 (2006.01)
Patent
CA 1040453
ABSTRACT OF THE DISCLOSURE A cage assembly for reinforcing concrete pipe. In the production of concrete pipe, wire fabric cages are formed and concrete is cast around the cages. The wire fabric con- ventionally comprises a plurality of crisscrossed strands, those strands running one way defining the longitudinal strands of the formed cage and those running the other way define the circum- ferential strands of the cage. To reinforce the concrete pipe at the crown and invert regions thereof, stirrup members are welded to these portions of the cage. The stirrup members pro- ject radially outwardly from the cage and may be rigidly connected both to an inner cage and to an outer cage. While the use of stirrups as presently employed ultimately renders the concrete pipe considerably stronger and more reliable, their use is both cumbersome and costly so far as assembly of the stirrups on the rolled cages. The present invention provides a cage assembly which is more easily assembled and therefore less costly. The cage assembly comprises a cage body having a plurality of longi- tudinal and circumferential strands, and a pair of mats, each formed of a network of interconnected strands. One of the mats is located generally at the crown and the other located generally at the invert of the cage body. Each of the mats includes a plurality of stirrup projections projecting from the surface thereof and projecting outwardly from the surface of the cage body.
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