Fm Class 1 Roof Deck

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

Fm class 1 roof deck. Please note also the needed deck gage and yield strength. 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. This will apply for zone 1. 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.

All class 1 roof assemblies are class a roofs but not all class a roof systems meet the class 1 rating. Fm class 1 roof deck construction and insulation approvals 1 membrane type. 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. Designed to help roofing professionals roofnav provides easy access to the most up to date fm approved roofing related information and related installation.

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 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. 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.

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