3.6.3
Vertical Runs
Run is defined as length of pipe between end joints. Vertical runs of
piping shall be braced at not more than 3 m 10 foot vertical intervals.
Braces for vertical runs shall be above the center of gravity of the
segment being braced. All sway braces shall be constructed in accordance
with the drawings. Sway braces shall attach to the structural system and
shall not be connected to branch lines, walls, or floors.
3.6.4
Clamps and Hangers
Clamps or hangers on uninsulated pipes shall be applied directly to pipe.
Insulated piping shall have clamps or hangers applied over insulation in
accordance with Section 15080 THERMAL INSULATION FOR MECHANICAL SYSTEMS.
3.7
SWAY BRACES FOR DUCTS
3.7.1
Braced Ducts
Bracing details and spacing for rectangular and round ducts shall be in
accordance with [SMACNA Seismic Restraint Mnl, including Appendix E][TI
809-04 procedures]. However, the design seismic loadings for these items
shall not be less than loadings obtained using the procedures in TI 809-04.
3.7.2
Unbraced Ducts
Hangers for unbraced ducts shall be attached to the duct within 50 mm 2
inches of the top of the duct [with a minimum of two #10 sheet metal
screws] [in accordance with SMACNA Seismic Restraint Mnl]. Unbraced ducts
shall be installed with a 150 mm 6 inch minimum clearance to vertical
ceiling hanger wires.
-- End of Section --
SECTION 15070A
Page 14
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