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Ord02 2241
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Ord02 2241
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Last modified
10/11/2019 2:58:30 PM
Creation date
10/11/2019 2:58:26 PM
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CC Index
CC Index - Document Type
Ordinance
Agency Type
City Council
Date
12/2/2002
Description
ORDINANCE NO ORDINANCE REPEALING ARTICLES IV, V, VI, VII, VIII AND ARTICLE IX, DIVISIONS 1, 2 AND 3 OF CHAPTER 9 OF THE CODE OF THE CITY OF REDWOOD CITY; ADDING ARTICLES IV, V, VI, VII, VIII AND ARTICLE IX, DIVISIONS 1 AND 2 OF CHAPTER 9 TO THE CODE OF THE CITY OF REDWOOD CITY RELATING TO THE ESTABLISHMENT OF REGULATIONS AND STANDARDS FOR BUILDINGS AND STRUCTURES IN THE CITY OF REDWOOD CITY AND ADOPTING BY REFERENCE THE FOLLOWING CODES: "THE UNIFORM BUILDING CODE 1997 EDITION"; "THE UNIFORM BUILDING SECURITY CODE, 1997 EDITION"; "THE UNIFORM HOUSING CODE, 1997 EDITION"; "THE UNIFORM MECHANICAL CODE, 2000 EDITION"; "THE UNIFORM PLUMBING CODE, 2000 EDITION"; "THE UNIFORM ADMINISTRATIVE CODE PROVISIONS FOR THE NATIONAL ELECTRICAL CODE, 1996 EDITION"; "THE NATIONAL ELECTRICAL CODE, 1999 EDITION"; AND "THE UNIFORM CODE FOR BUILDING CONSERVATION, 1997 EDITION
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WHERE: <br /> ~Savg = the average of the story drift at the extreme points of the structure at <br /> Level x. <br /> ~max = the maximum displacement story drift at Level x. <br /> The value of Ax need not exceed 3.0." <br /> <br /> Sec. 9.68 SECTION 1630.8.2 OF THE BUILDING CODE AMENDED: Section <br />1630.8.2 of the Building Code is hereby amended to read as follows: <br /> <br /> Section 1630.8.2.1 General. Where any portion of the lateral-load-resisting <br /> system is discontinuous, such as for vertical irregularity Type 4 in Table 16-L or <br /> plan irregularity Type 4 in Table 16-M, columns, beams, trusses or slabs <br /> supporting such discontinuous systems shall have the design strength to resist <br /> the combination loads resulting from the special seismic load combinations of <br /> Section 1612.4. The connections of such discontinued elements to the <br /> supporting members shall be adequate to transmit the forces for which the <br /> discontinuous elements were required to be designed. <br /> <br /> EXCEPTIONS: <br /> <br /> 1. The quantity Em in Section 1612.4 need not exceed the maximum force than <br /> can be transferred to the element by the lateral-force-resisting system. <br /> <br /> 2. Concrete slabs supporting light-frame wood shear wall systems or light-frame <br /> steel and wood structural panel shear wall systems. <br /> <br /> For Allowable Stress Design, the design may be determined using an allowable <br /> stress increase of 1.7 and a resistance factor, q), of 1.0. This increase shall not <br /> be combined with the one-third stress increase permitted by Section 1612.3, by <br /> may be combined with the duration of load increase permitted in Chapter 23. <br /> Division III. <br /> <br /> Section 1630.8.2.2 Detailing requirements in Seismic Zones 3 and 4. In Seismic <br /> Zones 3 and 4, elements supporting discontinuous systems shall meet the <br /> following detailing or member limitations: <br /> <br /> 1. Reinforced concrete or reinforced masonry elements designed primarily as <br /> axial-load members shall comply with Section 1921.4.4.5. <br /> <br /> 2. Reinforced concrete elements designed primarily as flexural members and <br /> supporting other than light-frame wood shear wall systems or light-frame steel <br /> and wood structural panel shear wall systems shall comply with Sections <br /> 1921.3.2 and 1921.3.3. Strength computations for portions of slabs designed as <br /> supporting elements shall include only those portions of the slab that comply with <br /> the requirements of these Sections. <br /> <br />Atty/Ord/Ord. 167 <br />102402 9 <br /> <br /> 2241 <br /> <br /> <br />
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