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[SEAOC] Gerber Girder Bottom Chord Extensions[Subject Prev][Subject Next][Thread Prev][Thread Next]
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- Subject: [SEAOC] Gerber Girder Bottom Chord Extensions
- From: Kevin Elbury <kelbury(--nospam--at)awinc.com>
- Date: Wed, 17 Apr 1996 09:36:23 -0700
Has anybody ever seen a gerber girder system with either wood plate or Trus-Joist TJL type joists used as bottom chord extensions at the column locations? I have a job where we spec'd steel owsj's with bottom chord extensions at all column locations where there were cantilevers -- an alternate has come up to use a wood plate truss system. Our drawings specify that the bottom chord extensions must be designed for a +/- load of 2% of the compression flange force which in this case amounts to 1000lbs. The only issue I see with a wood plate truss is the stiffness when this load is applied to the bottom chord -- that is what is the lateral deflection of the beam bottom flange and what is an acceptable limit? We are not in a seismic zone. Kevin Elbury, P.Eng. Kelowna, B.C., Canada ...
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