Fm Class 1 Roof Deck

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.

Fm class 1 roof deck.

Please note also the needed deck gage and yield strength. The standard applies to all components as assembled in the. 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. 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.

Determine the maximum steel deck span from fm 1 29 tables 1a 1d for 1 5b decks or 1e for 3n decks for the roof covering required. 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. 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. This will apply for zone 1.

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. The type of roof deck on the building. A class 1 panel roof is one which meets the criteria of this standard for fire wind foot traffic and hail damage resistance. 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.

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. Versiflex pvc mechanically attached roofing system factory mutual fm approvals b. All class 1 roof assemblies are class a roofs but not all class a roof systems meet the class 1 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 standard applies to all components as assembled in the system below the roof cover.