Fm Class 1 Roof Deck

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.

Fm class 1 roof deck.

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

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. A class 1 panel roof is one which meets the criteria of this standard for fire wind foot traffic and hail damage resistance. Please note also the needed deck gage and yield strength. 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.

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. The standard applies to all components as assembled in the. 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. 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.

This will apply for zone 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. 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.

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