Factory Mutual Roof Ratings

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.

Factory mutual roof ratings.

Whether or not the existing deck meets factory mutual minimum standards. Versiflex pvc mechanically attached roofing system factory mutual fm approvals b. We would like to show you a description here but the site won t allow us. Fm class 1 roof deck construction and insulation approvals 1 membrane type.

300 mm on center in the field of the roof use the same securement every 6 in. On center 150 mm in the perimeter. Failure is defined as the point where the roof deck. The class a brand weighs 2 000 grams class b 500 grams and class c 9 1 4 grams.

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. The brands consist of an ignited wood lattice placed directly on top of the test specimen. Pmv automation ab has notified fm approvals of a potential safety concern involving their series d3e digital valve positioners shipped to customers in the us between january 1 2010 and june 30 2019. Understanding wind uplift ratings page 2 of 5.

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. Double the deck securement required by roofnav for the needed field of roof rating. Both are burn through tests and the ultimate roof systems rating is the lowest of the three tests. For example if the specific fastening detail is required every 12 in.