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RE: Curved GLB

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It is still a basic statics/structural analysis problem (depending on your support conditions, it might be statically indeterminate).  It is all a function of what the supports are and whether or not you have a tie member or thrust resistance at the supports.  If there is no thrust resistance (either lateral support of the walls at the support or a tie member such as a tie rod), then it will be simply supported beam that just happens to be "bent".  If there is trust resistance, then it will behave like an arched element.  There is a good chance that in reality it will be something in between UNLESS you do a tie member such as a tie rod...even an unsupported wall will have some minimal thrust resistance.
Adrian, MI
-----Original Message-----
From: Gordon Goodell [mailto:GordonGoodell(--nospam--at)]
Sent: Tuesday, July 15, 2008 1:05 PM
To: seaint(--nospam--at)
Subject: Curved GLB

Im working on a project with curved GLB roof framing, ~16 span, 5o.c. w/ joists hung btwn them.  The architect is expecting a tie rod at plate level, but Im wondering how to calc the thrust at the base of these things.  Considering how theyre manufactured, it seems like there should be a lot less horizontal force at the plate than a simple statics analysis would indicate.


Gordon Goodell

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