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HomeMy WebLinkAbout93-002 - Amendments to the 1991 Editions of Uniform Plumbing Code003 RESOLUTION NO. 93-002 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF SANTA ANA MAKING CERTAIN FINDINGS WITH REGARD TO AMENDMENTS TO THE 1991 EDITIONS OF UNIFORM PLI/MBING CODE AND THE UNIFORM MECHANICAL CODE WHEREAS, the City Council proposes to approve an ordinance adopting the 1991 editions of the uniform codes published by the International Conference of Building Officials; and WHEREAS, the City Council considers it necessary, because of local climactic, geological or topographical conditions, to amend certain building standards in the Uniform Plumbing Code and the Uniform Mechanical Code, 1991 editions, as hereinafter set forth; and WHEREAS, pursuant to sections 17858.5, 17958.7 and 18941.5 of the Health and Safety Code of the State of California, the City Council is required to make findings that such amendments are necessary due to local climactic, geological, or topographical conditions, and to file such findings, together with the amendments, with the Department of Housing and Community Development of the State of California; NOW, THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF SANTA ANA AS FOLLOWS: 1. As amended, section 316 of the Uniform Plumbing Code, 1991 edition, will read as follows: Section 316 - Hangers and Supports (a) Vertical Piping Attachment - Vertical piping shall be secured at sufficiently close intervals to keep the piping in alignment and carry the weight of the piping and its contents. Stacks shall be supported at their bases, and as follows: (1) Cast iron soil pipe - Cast iron soil pipe shall be supported at every story or closer. (2) Screwed pipe - Screwed pipe (IPS) shall be supported at not less than every other story height. (3) Copper tubing - Copper tubing shall be supported at each story or at maximum intervals of ten (10) feet (3 m). 004 RESCI,UTIO~[ 93-002 Page 2 (4) Lead pipe - Lead pipe shall be supported at intervals not exceeding four (4) feet (1.2 m). (5) P.V.C./ABS plastic (D.W.V.) - Vertical piping shall be supported at each story or floor level. Alignment of vertical piping shall be maintained between floors with use of a mid-story guide. (b) Horizontal Piping (1) Supports - Horizontal piping shall be supported at sufficiently close intervals to keep it in alignment and prevent sagging. (2) Cast iron soil pipe - Where joints occur, suspended cast iron soil pipe shall be supported at not more than five (5) foot (1.5 m) intervals; except that pipe exceeding five (5) feet (1.5 m) in length, may be supported at not more than ten (10) foot (3 m) intervals. Supports shall be adequate to maintain alignment and prevent sagging and shall be placed within eighteen (18) inches (.5 m) of the hub or joint. Hubless or compression gasket joints must be supported at least at every other joint except that when the developed length between supports exceeds four (4) feet (1.2 m), they shall be provided at each joint. Supports shall also be provided at each horizontal branch connection. Supports shall be placed on or immediately adjacent to the coupling. Suspended lines shall be suitably braced to prevent horizontal movement. (3) Screwed pipe - Screwed pipe (IPS), except as provided in Section 1213(f) and Table 12-2, shall be supported at approximately ten (10) foot (3 m) intervals for piping three quarter (3/4) inch (19.05 mm) and smaller in diameter and twelve (12) foot intervals (3.6 m) for piping one (1) inch (25.4 mm) and larger in diameter. (4) Copper tubing - Copper tubing shall be supported at approximately six (6) foot (1.8 m) intervals for piping one and one-half (1-1/2) inches (38.1 mm) and smaller in diameter and ten (10) foot (3 m) intervals for piping two (2) inches (50.8 mm) and larger in diameter. (5) Lead pipe - Lead pipe shall be supported by strips or otherwise for its entire length. (6) In ground - Piping in the ground shall be laid on a firm bed for its entire length, except where support is otherwise provided, which is adequate in the judgment of the Administrative Authority. 2 P.ESOI,UTIO~.~ 93-002 Page 3 (7) Plastic pipe - Plastic pipe shall be supported at not to exceed four (4) feet (1.2 m) on centers, at end of branches, and at change of direction or elevation. Supports shall allow free movement, but shall restrict upward movement of lateral runs so as to not create reverse grade. (8) Suspended lines shall be suitably braced at no more than forty (40) foot intervals to prevent horizontal movement. (c) Hangers and Anchors (1) Material - Hangers and anchors shall be of material of sufficient strength to maintain their proportional share of the weight of pipe and contents. (2) Ail piping, fixtures, and equipment shall be adequately supported to the satisfaction of the Administrative Authority. (3) Ail horizontal cast iron drain, waste and vent piping, and all other horizontal piping 2½" and larger, shall be supported with approved rod and hangers, in accordance with Subsection (b) of this Section and with the following table: PIPE/TUBE SIZE MINIMUM ROD SIZE (Larger) (Engineered) Exception: Plumbers tape (perforated strap iron) may be used to support piping 2" and smaller in type V construction only. Plumbers tape shall be galvanized and not less than ~" wide and 22 gauge. 2. The city Council hereby finds and determines that the above amendment to section 316 of the Uniform Plumbing Code, 1991 edition, is necessary for the following reasons: This amendment is intended to provide for a more effective and consistent system of pipe support for piping used in plumbing and piping systems. This is deemed necessary in Santa Ana because of the significant potential for damage due to seismic activity. Santa Ana is in close proximity to major active fault systems in Southern California, and the Uniform Building Code 006 RESOLUTiOE 93--002 Page 4 designates our city in Seismic Zone #4. This is the highest seismic risk zone in a 4-tiered hierarchy which rates the potential risk for seismic activity by geographical areas. 3. As amended, subsection (a) of section 1002 of the Uniform Mechanical Code, 1991 edition, will read as follows: Sec. 1002. (a) General. Supply air return air and outside air for heating, cooling or evaporative cooling systems shall be conducted through duct systems constructed of metal as set forth in Tables Nos. 10-A, 10-B and 10-C; metal ducts complying with U.M.C. Standard No. 10-2 with prior approval; or factory-made air ducts complying with U.M.C. Standard No. 10-1. Ducts, plenums and fittings may be constructed of asbestos cement, concrete, clay or ceramics when installed in the ground or in a concrete slab, provided the joints are tightly sealed. EXCEPTION: Supply air duct, on the discharge side of an evaporative cooler, shall be conducted through rigid metal ducts constructed as set forth in tables nos. 10-A, 10-B and 10-C, and unless prohibited by structural conditions shall be graded in the direction of the supply outlet. Factory made air ducts complying with UMC standard no. 10-1 shall be limited to installation in a vertical position only. Note: Vertical shall be defined as not more than forty-five (45) degrees from the vertical. Corridors shall not be used to convey air to or from rooms if the corridor is required to be of fire-resistive construction by Section 3305 of the Building Code. Concealed building spaces or independent construction within buildings may be used as ducts or plenums. When gypsum products are exposed inducts or plenums, the air temperature shall be restricted to a range from 50°F. to 125°F. and moisture content shall be controlled so that the material is not adversely affected. Gypsum products shall not be exposed in ducts serving evaporative coolers. Venting systems and exhaust ducts shall not extend into or through ducts or plenums. 4. The City Council hereby finds and determines that the above amendment to subsection (a) of section 1002 of the Uniform Mechanical Code, 1991 edition, is necessary for the following reasons: The amendment is designed to mitigate a problem arising due to perpetual water chemistry, and high velocity winds 4 RESOLUTION 93-002 007 Pace 5 experienced by the City annually. The proposed limitation on the use of factory-made flex duct in an evaporative cooler supply is necessary to eliminate undue risk of failure as a result of water collecting in the duct. The normal process of cooling air by requiring the air to pass through a continuous flow of water results in the air being saturated with water. Under certain climatic and environmental conditions water may precipitate out of the air and will be deposited throughout a duct system. To supply water for cooling, the evaporative cooler is designed to discharge water around the top perimeter of the interior of the cooler case. The water in Santa Ana has a tendency to leave mineral deposits around each of the water outlets. This frequently results in water being deflected away from the filter rack and into the interior air stream. To compound the problem, during Santa Ana wind conditions even more water may be blown into the air stream. The net effect of one of more of the actions described above has resulted in sufficient water accumulating (pocketing) in a horizontal flexible duct so that a failure occurs and several gallons of water suddenly collapses onto a ceiling. Many dollars in property damage inevitably occurs and the potential for personal injury is fairly obvious. 5. The Clerk of the Council is directed to file a certified true copy of this resolution with the Department of Housing and Community Development of the State of California. ADOPTED this 4th day of Januarv , 1993. ATTEST: ~lerk of the Council-- Mayor COUNCILMEMBERS: Young Aye Pulido Aye Lutz Aye ~Cills Aye Moreno Aye Norton Absent Richardson Aye APPROVED AS TO FORM: Edward J. Cow City Attorney 5 008 CERTIFICATE OF ORIGINALITY State of California County of Orange I, JANICE C, GUY, Clerk of the Council, do hereby certify the attached Resolution ~- O~o7_~ to be the original resolution adopted by the City Council of the City of Santa Ana on of the City of Santa Ana