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Re: QUERY: Bond Beam Spacing Requirement[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaint(--nospam--at)seaint.org
- Subject: Re: QUERY: Bond Beam Spacing Requirement
- From: Roger Turk <73527.1356(--nospam--at)compuserve.com>
- Date: Fri, 24 Nov 2000 12:10:52 -0500
Jason Emoto wrote: >>UBC Sections 2126.96.36.199 and 2188.8.131.52 specify minimum reinforcing ratios depending upon seismic zone. In seismic zones 3 and 4, maximum reinforcing spacing is 4 feet (2184.108.40.206.2.2.3).<< But beware of the UBC reinforcing requirements for Seismic Zone 2! These reinforcing requirements are the result of HUD tests for *small* (< 2500 sf), lightly loaded, single story, one- or two-family residences and were somehow extrapolated to be permitted for buildings of *any* occupancy, height, and loading conditions in Seismic Zone 2. >>Bond beams are not specifically required, though. You can use joint reinforcing to satisfy minimum reinforcing requirements.<< If you carefully read brochures for joint reinforcing such as produced by Dur-O-Wal and AA, I think that you will find that joint reinforcing is restricted to crack control usage, and is not authorized to resist stress. A. Roger Turk, P.E.(Structural) Tucson, Arizona
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