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HomeMy WebLinkAboutReso 150-95 UniformCodeAmendRESOLUTION NO. 150 - 95 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF DUBLIN FINDINGS AS TO WHY AMENDMENTS TO THE UNIFORM CODES ARE NECESSARY WHEREAS, Section 17958.7 and 18941.5 of the Health and Safety Code of the State of California requires cities to adopt ordinances which impose the same restrictions as contained in the California Building Standards Code; and WHEREAS, the 1994 Edition of the Uniform Building Code, 1994 Edition of the Uniform Plumbing Code, the 1994 Edition of the Uniform Mechanical Code, the 1994 Edition of the Uniform Housing Code and the 1993 Edition of the National Electrical Code have been adopted in the California Building Standards Code; and WHEREAS, this City Council having before it an ordinance adopting those codes set forth herein above with changes; and WHEREAS, Section 17958.7 and 18941.5 of the Health and Safety Code of the State of California authorizes cities to make changes or modifications to the provisions of the California Building Standards Code as the City determines are reasonably necessary because of local climatic, geological or topographical conditions; and WHEREAS, this City Council has reviewed the reasons for the changes and modifications as set forth in Exhibit "A". NOW, THEREFORE, BE IT RESOLVED that the Dublin City Council does hereby declare and find that said changes or modifications to the provisions of the State Building Standards Code are reasonably necessary because of local climatic, geologic or topographical conditions as set forth in Exhibit BE IT FURTHER RESOLVED that a copy of this resolution be forwarded to the California Department of Housing and Community Development for filing as required by Section 17958.7 of the Health and Safety Code of the State of California. PASSED, APPROVED AND ADOPTED this 12th day of December, 1995. AYES: Councilmembers Barnes, Burton, Howard, Moffatt and Mayor Houston NOES: None ABSENT: None ABSTAIN: None ATTEST' K2/dec-95/reso-ubc.doc EX'~..BIT "A" TO RESOLUTION NO. 150 - 95 LIST OF CHA_NGES AND MODIFICATIONS TO THE 1994 EDITION OF THE UNIFORM BUILDING CODE, THE 1994 EDITION OF THE UNIFORM PLUMBING CODE, THE 1994 EDITION OF THE UNIFORM MECHANICAL CODE, THE 1994 EDITION OF THE UNIFORM HOUSING CODE AND THE 1993 EDITION OF THE NATIONAL ELECTRICAL CODE The sections listed below are sections of Ordinance No. 12 - 95 Sections 1, 3, 4. 7. 8, 9. 10. 13, 14. 32. 33, 34, 35, 36, 37. 38. 39, 40. 41, 47. 48, 49, 54. 55, 56, 58. 61, 62. 63, 64, 65, 66, 67, 68, 69 and 70 have been reformatted to new section numbers. Sections 2, 11 referenced incorrect reference. Sections 5, 12~ 15.16, 17, 18, 19, 21.24, 31~ 42 and 43 are in the new 1994 uniform codes. Sections 6, 44, 46, 57 and 60 adopts the uniform codes. Section 20 coincides with State law. Section 22 modifies the Uniform Building Code to require an automatic fire-extinguishing .system when of type V construction and the floor area exceeds 3,000 square feet in all occupancies, except R, Division 1 and 3. Section 23 modifies the Uniform Building Code to require an automatic fire-sprinkler system when Group A, B, E, H, I and R-1 and R-3 occupancies are located more than 1½ miles from a fire station. Section 24, adds a requirement of a minimum of one 1/2" diameter top and bottom reinforcement in all continuous foundations. This amendment is necessary because the City of Dublin is within a very active seismic area (Seismic Zone 4) and local soil conditions can be highly expansive clay soils; The Noahridge earthquake provided hundreds of examples of damage to plain concrete footings. This type of damage is extremely expensive to repair, in contrast to the small expense of providing nominal footing reinforcement. Footing reinforcement is also necessary to prevent damage due to pumping action caused by local expansive soils which shrink and swell during seasonal drying and wetting conditions. Section 25, modifies the Uniform Building Code to require slab reinforcement. This modification is necessary due to the expansive soil conditions and this is a typical minimum requirement by soil engineers in the City of Dublin in order to avoid damage due to soil expansion and shrinkage. Section 26, deletes the use of gypsum board for lateral bracing. This deletion is necessary because the City of Dublin is located in Seismic Zone 4. Gypsum wallboard has performed poo~y during recent California seismic events. The shear values for gypsum wallboard contained in the code are based on mono-directional testing. It is appropriate to limit the use of this product until cyclic loading testing are performed and evaluated. : Section 27, limits the use of portland cement plaster for lateral bracing to single story residential. This limitation is necessary because the City of Dublin is located in Seismic Zone 4. Exterior portland cement plaster has performed poorly during recent California seismic events. The shear values for portland cement stucco contained in the code are based on mono-directional testing. It is appropriate to limit the use of this product until cyclic loading testing are performed and evaluated. Section 28, adds a new paragraph to require upgrade of suspended ceiling systems for alteration and repair projects. This amendment is necessary to mitigate a known seismic hazard in existing buildings due to the City of Dublin's proximity to local active faults. Section 44, limits the use of NM and NMC cables. The City of Dublin is located in the highly active seismic zone 4. Nonmetallic-sheathed cable is not afforded the same protection from damage as 2 wiring in raceways. Dm~,,.,ge to Nonmetallic-sheathed cable coulct occur in a seismic event which increases the potential for a fire. Section 49, eliminates water piping in or under concrete floor slabs within a building. This amendment is necessary for the following reasons: 1. Most of the surface soils in the City of Dublin are relatively young and unconsolidated sedimentary materials formed from a wide variety of parent materials. The varying chemical composition, degree of weathering, and the relatively acid environment have created soils of varying types, which are particularly corrosive in nature. 2. Much of the surface soil in the City of Dublin is highly expansive (i.e., shrink - swell behavior) and have low bearing strength. There are two types of expansive soils in the area: the organic silty clays which are the recent bay muds; and the plastic silty clays which weather from the shale found in the hills surrounding the City of Dublin. 3. The local climate is characterized by markedly delineated rainy and dry seasons, which tend to maximize the expansive characteristics of soil. 4. Some parts of the City of Dublin have hard water, which is corrosive to ferrous pipe. 5. The groundwater table is unusually high in many places. 6. The City of Dublin is a highly active seismic area. Section 50, requires backflow protection if drainage piping serving fixtures is less than 12 inches above the next upstream manhole. This requirements is necessary due to the fact that the City of Dublin topography includes mountainous and foothill areas with intermittent steep slopes. Also, the City of Dublin is located in a seismically active area, which increases the likelihood of breakage of building sewers and laterals, leading to an above average potential of sewage back-up into buildings without adequate protection. Section 51, adds a subsection regarding location and termination of cleanouts. This subsection is necessary because the City of Dublin soils are expansive in nature. These expansive soils create unstable conditions which increase the potential of breaks in sewer laterals. To maintain health and sanitary services, it is necessary to gain access, to periodically maintained public sanitary laterals. This is accomplished by the additional cleanout as required above. Section 52, details condensate disposal and drain sizing. This amendment is required because the waste treatment facilities serving the City of Dublin is operating at or near maximum capacity. The discharge of treated waste water into San Francisco Bay is detrimental to its sensitive ecosystem. Cooling coil and comfort cooling equipment condensate waste discharge does not contain pollutants which require treatment before being discharged into storm sewers or the ground. Section 58, amends the code to comply with local sanitation district requirements regarding disposal for condensate for HVAC systems. The waste water treatment facilities serving the City of Dublin is operating at or near maximum capacity. The discharge of treated waste water into San Francisco Bay is detrimental to its sensitive ecosystem. Cooling coil and comfort cooling equipment condensate waste discharge does not contain pollutants which require treatment before being discharged into storm sewers or the ground.