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NFPA 13D permits "support methods comparable to those required by local plumbing codes." The above hanger/support requirements must also be followed on NFPA 13D systems. CAUTION: DO NOT use hanger items such as plumber's tape or "nail -on" devices, Pipe hanger must comply with NFPA 13, 13D and 13R. When a sprinkler head activates, a significant reactive force can be exerted on the pipe. With a pendent head, this reactive force can cause the pipe to lift vertically if it is not secured properly, especially if the sprinkler drop is from small diameter pipe. The pipe must be braced against the vertical lift -up with the closest hanger. Refer to the following illustration and Table A & S. A A Hsu Sgott I*— Spso, ng Brace/Support Brace/Support Finished Cei Table A - Maximum Support Spacing Distance End Line Sprinkler Head Drop Elbow Pipe Size Line Pressure Line Pressure <100 psi >100 psi u Pipe Size I c (> Nominal inches (<689kPa) (>689kPa) )m ( al 01 (1 mm) 'Ft (314 -(DN20) 9 inches (228,6 mm) 6 Line mm) I (DN25) 12 inches (304,8 mm) 9 inches (228,6 mm) 1-1/4 (DN32) 16 inches (406,4 mm) 12 inches (304,8 mm) L1-1=/2- 3 (=DN40- DN80) 24 inches (610,0 mm) 12 inches (304,8 mm) Note: Support spacing can be increased by approximately 50% for lower pressures. Table B - Maximum Support Spacing Distance Inline Sprinkler Head Drop Tee Pipe Size Line Pressure Line Pressure ip Size <100 psi >100 psi c Nominal inches (<689kPa) (>689kPa) Nominal ( al 01 314 (DN20) 4 feet (1,22 meters) 3 feet* (0,91 meters) 1 (DN25) 5 feet (1,52 meters) 4 feet* (1,22 meters) 1-1/4 (DN32) 6 feet (1,83 meters) 5 feet* (1,52 meters) 1-1/2 - 3 (DN40 - DN80) 7 feet (2,13 meters) 7 feet (2,13 meters) Note: *Support spacing can be increased by one foot for lower pressures. FG-3-1 010 0 2010 Spears"' Manufacturing Company Page 39