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Can you provide me with a brief explanation of the spectrum of ratings for "guage UL thickness" and also for "wind uplift classification"? I am an insurance agent and I am trying to understand the rating system for the two above metal roof characteristics.
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"gauge UL thickness" does not mean anything to me unless it is just a measurement of the metal thickness.
Wind uplift is generally referred to in terms of psf, with the most stringent tests topping out at 90 psf
Does this help at all?
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The UL 90 rating is a comparative rating, meaning that it does not guarantee that a roof systm will withstand any amount of wind. The UL 580 test chamber is only 10' x 10' and the panels can be bolted down for the test. The guage panels that were tested will be listed in the test report. The panels shipped to the job must be at least the guage tested to be considered UL 90 rated (assuming the roof system passed the UL 90 test to begin with).
Wind uplift is best determined by the ASTM E1592 test method, which is much more realistic. Engineers use the results of these tests to design a roof to withstand the wind speeds dictated by code for the area, based on the exposure, building geometry and roof eave height.
4/26/2007
Or copy this URL: https://www.metalroofing.com/spirit/comment/9505/find/Isaiah Industries, Inc.
4/27/2007
Or copy this URL: https://www.metalroofing.com/spirit/comment/9506/find/NCI Building Systems, Inc.
5/3/2007
Or copy this URL: https://www.metalroofing.com/spirit/comment/9507/find/