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material for the roof
PostPosted: Thu May 26, 2016 1:17 pm Reply with quote
Anton
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Joined: 26 May 2016
Posts: 1




Hello,
I create a tent with a vinyl roof. what material is best to choose for the roof? Vinyl in the database is not found.
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PostPosted: Thu May 26, 2016 5:47 pm Reply with quote
thomas
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Joined: 16 Mar 2011
Posts: 73




Hi Anton,
you have to define a new material.
I suppose the roof is a membrane? Then take the mass/area,
calculate (aproximate) the transmission coefficient
(mass-frequency-law) and use that as the absorption coefficient.
That is ok as long as no reflection comes back through the
membrane from the outside (e.g. from walls outside the tent).

kind regards
Thomas
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