Fm Global Roof Ratings

The research is also used to enhance external standards.

Fm global roof ratings. A roof assembly is tested to meet. Situation is i speced a roof customer emailed last night asking wind rating i spent hours trying to figure that out after hours. Fm global conducts research for use in the fm global data sheets that our engineering field staff use to support our client s efforts to protect their business. New users can begin their free registration here.

Include drawings and details of the roof cover flashing and design loads. This may be all that is specified. 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 wind ratings explination.

Because fm approvals requires a 2 1 safety factor roofs with field of roof uplift forces of 30 pounds per square foot are the maximum for 1 60 ratings and 37 5 pounds per square foot are the maximum for 1 75 ratings etc. In this situation the fm regional engineer specifies that the roof must have a wind rating such as 1 60 1 75 or 1 90. Because fm approvals requires a 2 1 safety factor roofs with field of roof uplift forces of 30 pounds per square foot are the maximum for 1 60 ratings and 37 5 pounds per square foot are the maximum for 1 75 ratings etc. Roofnav can take the guesswork out of configuring an fm approved roofing system leaving you to focus on what matters most.

I m finding it much simpler just to use the manufacturer wind warranty options than screwing with all this fm stuff. Fm wind rating specified only. Technical reports supporting code change. Roof projects new fm global reviews roof plans to determine resistance to anticipated wind uplift pressures and fire spread potential.

The registration process is free and only takes a few minutes to complete. Fm approvals is the only organization in the world that tests complete roof assemblies when subjected to multiple perils such as fire testing above and below the deck wind uplift testing hail damage testing accelerated weathering water leakage foot traffic and corrosion resistance testing of metal parts. The end result as tom s article points out is that there are currently many fewer roof system options available that meet the vsh rating roughly 600 vsh rated assemblies of the 1 million fm global roofnav assembly listings.