Fm Global Class 1 Roof

This section contains reports that are generated to update national and international codes and standards.

Fm global class 1 roof. A perfect example of this occurs frequently on the west coast where half inch plywood is commonly used for roof deck construction. To be rated as a class 1 panel roof assembly only class 1 approved components may be used. 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. This standard applies to any component intended for use in assembling a panel roof including metal and plastic panel roofs.

The assembly which exhibits low fire spread below and above the panel adequate simulated wind uplift resistance and adequate strength and durability during the approval examination will qualify as a class 1 assembly. 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 approved roof assemblies must conform to one or more approval standards which include approval standards 4450 for class 1 insulated steel deck roofs approval standard 4470 for class 1 roof covers approval standard 4471 for class 1 panel roof or approval classification standard no. The best rating achieved is class a which is described by ul as effective against severe fire exposure class 1 rating.

4435 for roof flashing. According to the scope of fm 4470. However in many instances these non fm global insured buildings do not meet fm approvals minimum requirement for roof decks etc yet the designer still calls for an fm approved system. Designed to help roofing professionals roofnav provides easy access to the most up to date fm approved roofing related information and related installation recommendations from relevant fm global property.

Fm global property loss prevention data sheet 1 28 wind design. According to the scope of fm 4470. Fm global property loss prevention data sheet 1 31 metal roof systems. Roofnav can take the guesswork out of configuring an fm approved roofing system leaving you to focus on what matters most.

Fm approval standard 4880 class 1 fire rating of insulated wall or wall roof ceiling panels interior finish materials or coatings and exterior wall systems. The standard applies to all components as assembled in the system below the roof cover. Fm global conducts research for use in the data sheets that our engineering field staff use to support our client s efforts to protect their business. This test is significant as it indicates the successful testing of the entire roof assembly using fm approval standard 4470.

The class 1 rating is an exclusive designation that can only be awarded by fm global which indicates the successful testing of the entire roof assembly using fm approval standard 4470.