Fm Class 1 Roof Deck

The standard applies to all components as assembled in the.

Fm class 1 roof deck.

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. 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. 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.

Designed to help roofing professionals roofnav provides easy access to the most up to date fm approved roofing related information and related installation. 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. 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. 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.

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. The type of roof deck on the building. In this scenario our building which is designed with 23 pounds per square foot of uplift would require an fm approved class 1. Fm class 1 roof deck construction and insulation approvals 1 membrane type.

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. The standard applies to all components as assembled in the system below the roof cover. This standard states approval requirements for class 1 panel roofs. 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.

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.