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Membrane Cover Uplift

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Beamman

Structural
Sep 29, 2000
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Hi,

I have a membrane cover at the top of a 60' high storage tank with 2' of freeboard. The cover droops down and touches the liquid.

Is there a way to calculate what the wind uplift would be on this cover.

Thanks for any suggestions.

Mark
 
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API650 and ASCE 7 include design loadings for uplift on roofs, but they are not necessarily applicable to a floppy dynamic roof.

One consideration is that the uplift can't significantly exceed the tearing strength of the fabric- I've seen posts elsewhere where this was taken advantage of in awning design and the like.
 
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