Because fm approvals requires a 2 1 safety factor roofs with field of roof uplift forces of 30 pounds per square foot are the maximum for 1 60 ratings and 37 5 pounds per square foot are the maximum for 1 75 ratings etc.
Fm rating roof.
Take the guesswork out of an fm approved roof roofnav can take the guesswork out of configuring an fm approved roofing system leaving you to focus on what matters most.
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Through fm approved products you get a roofing system that has been proven in extensive testing to perform as specified including wind uplift fire resistance and many other factors.
Fm approvals is a leader in certification and approval of roof assemblies.
Because fm approvals requires a 2 1 safety factor roofs with field of roof uplift forces of 30 pounds per square foot are the maximum for 1 60 ratings and 37 5 pounds per square foot are the maximum for 1 75 ratings etc.