To be rated as a class 1 panel roof assembly only class 1 approved components may be used.
Fm global class 1 roof.
The performance of a panel roof depends in part on all.
4435 for roof flashing.
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.
Roofnav can take the guesswork out of configuring an fm approved roofing system leaving you to focus on what matters most.
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 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.
Class 1 the class 1 label is an exclusive designation that can only be awarded by fm global.
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.
The best rating achieved is class a which is described by ul as effective against severe fire exposure class 1 rating.
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.
A perfect example of this occurs frequently on the west coast where half inch plywood is commonly used for roof deck construction.
Fm global property loss prevention data sheet 1 28 wind design.
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.
According to the scope of fm 4470.
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 section contains reports that are generated to update national and international codes and standards.
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.
The standard applies to all components as assembled in the system below the roof cover.
The research is also used to enhance external standards and codes.
Fm global property loss prevention data sheet 1 31 metal roof systems.
