Factory Mutual Roof Ratings

Whether or not the building is a special use facility such as an airplane hangar a hospital or a facility with many large dock doors etc.

Factory mutual roof ratings.

Whether or not the building has parapet walls and if it does their height. Understanding wind uplift ratings page 2 of 5. We would like to show you a description here but the site won t allow us. Failure is defined as the point where the roof deck.

August 19 2020 product alerts product safety notification for pmv automation ab series d3e digital valve positioners. 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. Whether or not the existing deck meets factory mutual minimum standards. Versiflex pvc mechanically attached roofing system factory mutual fm approvals b.

Fm class 1 roof deck construction and insulation approvals 1 membrane type. For example if the specific fastening detail is required every 12 in. The class a brand weighs 2 000 grams class b 500 grams and class c 9 1 4 grams. 050 060 or 080 versiflex pvc reinforced membrane white gray or tan deck type 2 insulation 3 insulation thickness maximum slope for astm e 108 class a rating.

300 mm on center in the field of the roof use the same securement every 6 in. Double the deck securement required by roofnav for the needed field of roof rating. The brands consist of an ignited wood lattice placed directly on top of the test specimen. Both are burn through tests and the ultimate roof systems rating is the lowest of the three tests.