Factory Mutual tested and approved coping systems for use on parapet walls up to 32-inches wide. PermaSnap Premier Plus offers some of the highest wind ratings in the industry, up to an FM 1-120 rating with test pressures up to 329 PSF (vertical), and 190 PSF (horizontal).
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Both products have a 25 year, 155 mph wind warranty
Please note that these calculations are based on U.S. measurements and roofing practices, and may not be sufficient or applicable for use outside of North America.