Fm Class 1 Roof Deck

Versiflex pvc mechanically attached roofing system factory mutual fm approvals b.

Fm class 1 roof deck. This standard states approval requirements for class 1 panel roofs. 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. The type of roof deck on the building. All class 1 roof assemblies are class a roofs but not all class a roof systems meet the class 1 rating.

In this scenario our building which is designed with 23 pounds per square foot of uplift would require an fm approved class 1 60 system design and follow the requirements of data sheet 1 29 for corner and perimeter enhancements. Designed to help roofing professionals roofnav provides easy access to the most up to date fm approved roofing related information and related installation. 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. The standard applies to all components as assembled in the.

Approval criteria may include but are not limited to performance requirements marking requirements examination of manufacturing facility ies audit of quality assurance procedures and a follow up program. 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. A class 1 panel roof is one which meets the criteria of this standard for fire wind foot traffic and hail damage resistance. In this scenario our building which is designed with 23 pounds per square foot of uplift would require an fm approved class 1.

A class i insulated steel roof deck is one which meets the criteria of this standard for fire wind uplift live load resistances corrosion of metal parts and fatigue of plastic parts. This standard states fm approvals requirements for theapproval of class 1 insulated steel roof decks aclass 1 insulated steel roof deck is one which meets the criteria of this standard for fire wind uplift live load resistances corrosion of metal parts and fatigue of plastic parts. A class 1 roof has undergone a series of tests that evaluate the entire roof assembly including the external spread of flame test utilized for the class a rating. A roof is classified as a class a as the result of one test the external spread of flame test astme 108 or ul 790 standard.

Fm class 1 roof deck construction and insulation approvals 1 membrane type.