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RE: wind on signs

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Title: RE: wind on signs

You should look at research carried out by C.W.Letchford.  Has been incorporated into the Australian Standard and (I think) Canadian.

If you can't find the reference, for  face aspect ratio of 3:1, the Australian Co-efficients are
-for wind inclined at 45degrees to the sign face Cq = 1.7 for windward half,  1.1 for leeward half.
-for wind perpendicular to the face cq=1.5 (which is close to your code value of 1.4)
Mark Hickey
Brisbane Australia

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