If you use a tie rod, it will become a point of restraint as the arch tries to deflect. Therefore the tie rod will have to resist the full static thrust load of approximately (w * L squared) / (8 * H).
Regards,
Harold Sprague
Subject: Curved GLB
Date: Tue, 15 Jul 2008 11:04:46 -0600
From: GordonGoodell@harmonydesigninc.com
To: seaint@seaint.org
I'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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