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BILLBOARD SIGN DEFLECTION CRITERIA[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaoc(--nospam--at)seaoc.org
- Subject: BILLBOARD SIGN DEFLECTION CRITERIA
- From: uthoff(--nospam--at)S6.hninc.com
- Date: Thu, 9 Oct 1997 7:12:58 -0800
I have a billboard with two flagpole type column supports. The sign has about 450 square feet of surface about 20 feet up in the air. 1. Does anyone have any recommended deflection criteria for billboards? The sign I'm looking at will have people around it most of the time. I think AASHTO has a code on it, but I can't find it right now. I know you do not want the vibration to be perceptible in moderate winds (say 30 mph), yet probably will accept perceptable deflection for maximum wind (70 + mph). 2. Does anyone have names & phone numbers & contact person for billboard sign manufacturers. I can find flagpoles in Sweet's (10350), but not billboards. I've heard that the flagpole supports are tapered partly because it damps out any potential resonance (variable moment of inertia = variable natural period) under wind loading. I wanted to call and learn more. Thanks Steve Uthoff, S.E.
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