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.
Regards,
Scott
Adrian, MI
-----Original Message-----
From: Gordon Goodell [mailto:GordonGoodell@harmonydesigninc.com]
Sent: Tuesday, July 15, 2008 1:05 PM
To: seaint@seaint.org
Subject: Curved GLBI’m working on a project with curved GLB roof framing, ~16’ span, 5’o.c. w/ joists hung btwn them. The architect is expecting a tie rod at plate level, but I’m wondering how to calc the thrust at the base of these things. Considering how they’re manufactured, it seems like there should be a lot less horizontal force at the plate than a simple statics analysis would indicate.
thanks,
Gordon Goodell
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