Fm Class 1 Roof Deck

The standard applies to all components as assembled in the system below the roof cover.

Fm class 1 roof deck.

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. 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 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. Approval standard fm 4470single ply polymer modified bitumen sheet built up roof bur and liquid applied roof assemblies for use in class 1 and noncombustible roof deck construction approval standard fm 4471class 1 panel roofs approval standard fm 4475class 1 steep slope roof covers approval standard fm 4476flexible photovoltaic modules.

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. 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. 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.

A class 1 panel roof is one which meets the criteria of this standard for fire wind foot traffic and hail damage resistance. The standard applies to all components as assembled in the. Versiflex pvc mechanically attached roofing system factory mutual fm approvals b. Fm class 1 roof deck construction and insulation approvals 1 membrane type.

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. This will apply for zone 1. 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.

For roof areas where the wind rating recommended for the field of the roof does not exceed fm class 1 75 75 pounds per square foot psf 3 6 kpa roof perimeter attachment now is rec ommended to be increased a minimum of 50 percent with at least one fastener per 2 square feet 0 186 m2 and roof corner attachment is recommended to be increased 100 percent with at least one fastener per square foot 0 092 m2.