Fm Global Class 1 Roof

This test is significant as it indicates the successful testing of the entire roof assembly using fm approval standard 4470.

Fm global class 1 roof. The best rating achieved is class a which is described by ul as effective against severe fire exposure class 1 rating. The standard applies to all components as assembled in the system below the roof cover. If the client desires a higher rating the test is. 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.

A perfect example of this occurs frequently on the west coast where half inch plywood is commonly used for roof deck construction. 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. 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. Roofnav can take the guesswork out of configuring an fm approved roofing system leaving you to focus on what matters most.

This section contains reports that are generated to update national and international codes and standards. To be rated as a class 1 panel roof assembly only class 1 approved components may be used. Fm global property loss prevention data sheet 1 31 metal roof systems. 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.

Half inch plywood does not meet fm approvals requirements regardless of the roof cover type. If a building is fm global insured and has a nonconforming deck type such as half inch plywood fm. 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. The performance of a panel roof depends in part on all.

According to the scope of fm 4470. Fm global property loss prevention data sheet 1 28 wind design. 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. 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.

Systems the test frame is 5 feet by 9 feet if a rating of class 1 90 or below is desired. The research is also used to enhance external standards and codes. According to the scope of fm 4470.