. . .

Supports for rectangular ducts as set forth in the ANSI/SMACNA 006-2006 HVAC Duct Construction Standards--Metal and Flexible or another approved duct construction standard, when suspended from above, shall be installed on two opposite sides of each duct and shall be welded, riveted, bolted, or metal screwed to each side of the duct at not more than the intervals specified. (Ord. 2010-0056 § 12, 2010.)