Return to index: [Subject] [Thread] [Date] [Author]
Re: Beam Splices
[Subject Prev][Subject Next][Thread Prev][Thread Next] To: seaint(nospamat)seaint.org
 Subject: Re: Beam Splices
 From: richard lewis <rlewistx(nospamat)juno.com>
 Date: Wed, 11 Jul 2001 17:11:13 0500
Locating the beam splice where the moment is zero is really an arbitrary
place. Actually, wherever you locate a splice the moment is zero as long
as you make it a shear connection splice.
AISC has the "Beam Diagrams and Formulas" for cantilevered beams (ASD pg
2311). It is a good starting point to locate the splice. I start by
using this. The idea is to try to "balance" the moments by shifting the
splice points. I try to get the negative moments on a beam that
cantilevers over 2 columns to "balance" if possible. Then whatever beam
fits between them as a simple span. If the column line spacing is uniform
then the splice points are about the same. If the column line spacing
varies then the cantilever lengths are different in order to "balance" the
negative moments. Theoretically you are suppose to use unbalanced live
loading to design the beams which shifts the point of zero moment around on a
continuous beam line. That's why it is really not worth trying to find the
theoretical location, just force the zero moment by putting a splice
there. In snow regions I use a 50% unbalanced live load to account for
blowing wind and shifting snow. That's a personal preference.
Rich
On Wed, 11 Jul 2001 14:24:14 0500 "Alden Manipula" <amanipula(nospamat)novagroupinc.net>
writes:

 Prev by Subject: RE: Beam Splices
 Next by Subject: RE: Beam Splices
 Previous by thread: RE: Beam Splices
 Next by thread: RE: Beam Splices
 About this archive
 Messages sorted by: [Subject][Thread][Author][Date]