Page 56 - CPVC Fire Sprinkler Products Installation Instructions & Technical Handbook
P. 56

Sway Bracing Guidance for CPVC
Sway bracing for BLAZEMASTER CPVC shall be designed and installed per NFPA 13. Compressive load shall not be placed on CPVC pipe. Many common longitudinal sway braces exert compressive load on the pipe through a clamp and shall not be used with CPVC products. In order to avoid this, the installer should use lateral sway braces designed for use with CPVC pipe in one of the following manners. In accordance with NFPA 13, a lateral sway brace may be used as a longitudinal brace if they are within 24 in. of the centerline of the piping to be braced longitudinally and the lateral brace is on a pipe of equal or greater size than the pipe being braced longitudinally. If a line of equal or greater size is not available in the location of longitudinal bracing, a dead leg may be installed. This dead leg may be used to longitudinally brace a line with a lateral brace. Follow the procedure below to install and brace a dead leg.
Step 1. Install a tee in the main or cross main at the point where longitudinal bracing is required.
Step 2. Cut a length of pipe with a diameter equal to or greater than the diameter of the main being longitudinally braced.
Step 3. Cap one end of the pipe using proper solvent welding technique. (See section on “Joining CPVC Pipe and Fittings with One-Step Solvent Cement.”)
Step 4. Solvent weld the pipe to the tee perpendicular to the main being longitudinally braced.
Step 5. Attach a lateral sway brace designed for use with CPVC pipe to the dead leg. The sway brace must be no greater than 24 in. from the center line of the main.

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