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[SEAOC] L.A. Building Code -Reply[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaoc(--nospam--at)seaoc.org
- Subject: [SEAOC] L.A. Building Code -Reply
- From: Dave Schnitger <DSCHNITG(--nospam--at)BAS.CI.LA.CA.US>
- Date: Tue, 05 Mar 1996 14:21:19 -0800
- Cc: skh(--nospam--at)eqe.com
>>> Stephen K. Harris <skh(--nospam--at)eqe.com> asked on 02/21/96 10:05am Does anyone know what year the City of L.A. changed the seismic portions of its building code to the equivalent of the 1976 UBC? I'm particularly interested in the change of Cp for tilt-up wall anchorage from 0.2g to 0.3g and the increase in the maximum base shear from 0.133W to 0.186W. Stephen K. Harris EQE International 44 Montgomery St, Suite 3200 San Francisco, CA 94131 ... Steve: According to George Potter, Structural Engineering Associate with the Department of Buiding & Safety Training and Emergency Management Division (213) 580-1150, the code formulas with common values are: 1) 1972 Los Angeles Building Code (LABC) V = KCW = (1.33)(0.1)(W) = 0.133W Cp = 0.20 2) 1976 LABC V = IKCSW = (1)(1.33)(0.14)(W) = 0.186W Cp = 0.20 3) 1980 LABC V = IKCSW = (1)(1.33)(0.14)(W) = 0.186W Cp = 0.20 4) 1985 LABC, based on 1985 UBC, and adopted 5/27/87 V = ZIKCSW Cp = 0.30 CS = 0.14, Z=1.0, I=1.0, K=1.33 for bldgs with a box system except K=1.0 for plywood shear walls less than or equal to 3 stories. V= ZIKCSW = 0.186W for bldgs with masonry shear walls V = ZIKCSW = (1)(1)(1.0)(0.14)W = 0.14 for wood bldgs w plywood shear walls. Hope this helps. Please contact George via telephone if you need more information. David Schnitger, Director of Systems Department of Buildling & Safety City of Los Angeles (213) 580-1085 E-mail: dschnitg(--nospam--at)bas.ci.la.ca.us ...
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