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SECTION 38: The City Council of the City of Santa Ana hereby finds, determines <br />and declares that adoption of section 8 -570 amending California Mechanical Code <br />Section 602.1 is necessary because of corrosion related to the high seasonal humidity <br />in this coastal area which prevents moisture collecting in flexible ducting of evaporative <br />cooling systems from draining and evaporating, contributing to the deterioration of the <br />ductwork thereby endangering person's health and the environment. <br />SECTION 39: That section 8 -570 of the Santa Ana Municipal Code is hereby amended <br />such that it reads as follows (new language underlined, deleted language in strikeout for tracking <br />purposes only): <br />Sec. 8 -570. Ducts -- Material (Section 602.1). <br />Section 602.1 of the mechanical code is amended to read as follows: <br />- -' <br />- <br />602.1 General. Supply air, return air, and outside air for heating. coolin <br />or evaporative cooling systems shall be conducted through duct systems <br />constructed of metal as set forth in the ANSI /SMACNA 006 -2006 HVAC <br />Duct Construction Standards - Metal and Flexible or another approved <br />duct construction standard. Rectangular ducts in excess of two l2) inches <br />w.g. shall comply with the ANSI /SMACNA 006 -2006 HVAC Duct <br />Construction Standards - Metal and Flexible or another approved duct <br />construction standard. Ducts, plenums, and fittings may be constructed of <br />concrete. clay, or ceramics when installed in the ground or in a concrete <br />slab, provided the joints are tightly sealed. <br />In other than Group A. E, H, I, L, and R occupancies. high -rise buildings <br />and other applications listed in Section 1.11.0 regulated by the Office of <br />the State Fire Marshal, corridors shall not be used to convey air to or from <br />rooms if the corridor is required be of fire - resistive construction per the <br />Building Code. In Group A E H I L and R occupancies high -rise <br />buildings, and other applications listed in Section 1.11.0 regulated by the <br />Office of the State Fire Marshal, corridors shall not be used to convey air <br />to or from rooms except where permitted in accordance with Section <br />1018.5 of the California Building Code. <br />Ordinance No. NS -XXXX <br />7e A _�f0 Page 20 of 50 <br />