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- DES:d-ik 11/07/89 (029/7) DES:( 11/13/89R "Appendix A to Division 4, Article IX, Chapter 9 of the Code of the City of Redwood City, California "For purposes of preparing engineering reports on URM buildings for the City of Redwood City, the following engineering standards shall apply. (a) Minimum Earthquake Forces for Structures. (1) General. Except as provided in (a) (2) every structure shall be designed and constructed to resist minimum total lateral seismic forces assumed to act nonconcurrently in the direction of each of the main axes of the structure in accordance with the following formula: V = ZIKCSW. The value of ZIKCS need not exceed the values set forth in Table A-I based on the applicable rating classification of buildings. (2) Lateral Forces on Elements of Structures. Parts or portions of structures shall be analyzed and designed for lateral loads in accordance with subsection 2312(e) of the 1985 Uniform Building Code, 1985 Edition, but not less than the value from the following formula: Fp = ZISCpWp. The values shown on Table A-I and the value of Cp need not exceed the values as set forth in Table A-2. (b) Testing. Testing of URM walls utilized to carry vertical loads and seismic forces shall be performed as follows: (1) Mortar joints may be raked, cleaned and pointed with Type S or N mortar (no masonry cements) prior to testing, under the continuous observation of a deputy building inspector or special inspector as defined in the UBC. (2) Tests may consist of in-place shear tests or core tests. The minimum number of tests shall be two (2) per wall or line of wall elements resisting a common force, or one (1) per fifteen hundred (1500) square feet of wall surface, with a minimum of eight (8) total tests. Exact test or core locations shall be field- determined by the civil or structural engineer responsible for the engineering report. (3) For each in-place shear test, the bed joints of the outer wythe of the masonry shall be tested in shear by 15 2004 ___ _ ~""""""",~,,,,,.,,,,_,.,,,,~_,,_,_....~.....__,,,,,,,_"".,, _"..._ '_--oA"'__~'__"~"_,___"__,,.