Meneghini,
The standard that this is referring to is UL 580 - Test for Uplift Resistance of Roof Assemblies. The '90' is the typical result, specifically the result is Class 90.
UL 580 is a test that simulates wind uplift with uniform air pressure.
Regards,
David Stermer
David Stermer
2011-08-25 12:08:00.000000
hi, i found in a metal roofing brochure a reference about UL 90. I don't know this standard and i'm not able to find it on UL website.
Can you give some information about this standard ? thank you so much !!!
