Insteel produces concrete pipe reinforcement ("CPR") for a wide range of pipe sizes and types, providing circumferential structural integrity for round, elliptical and arch reinforced concrete pipe (RCP). CPR is manufactured to meet specific steel area requirements for all RCP diameters, classes, and wall thicknesses, and may be positioned and proportioned with combinations of inner and outer cages, quadrant mats and alternate elliptical cages. Convoluted (flex wire) CPR is available for large bell RCP. CPR is produced on automatic welding machines for exact placement of circumferential and longitudinal wires and is available in REGular wind (cross wires outside) or REVerse wind (cross wires Inside).
We produce CPR using both plain (W) and deformed (D) wire. Plain wire is manufactured to 65 ksi as a standard and up to 80 ksi if specified, while deformed wire is manufactured to 70 ksi as a standard and up to 80 ksi if specified.
By producing CPR with exact steel areas and precise designs, we can eliminate unnecessary stockpiling of steel materials and oversteeling. Each order can be customized to meet the unique requirements of your concrete pipe manufacturing equipment, thereby eliminating waste. We also stock standard styles of CPR from steel area .07 through .72 for immediate delivery. In addition, we can provide engineering support and, in some cases, provide "pipe car" analysis for "customer" and "engineer of record" approvals.
Our CPR products conform to ASTM A1064 (replaces A185 for plain welded wire and A497 for deformed welded wire).
Product or Application
- Concrete Pipe
- Box Culverts