Fm Global Roof Ratings

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.

Fm global roof ratings.

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. Roof projects new fm global reviews roof plans to determine resistance to anticipated wind uplift pressures and fire spread potential. The following guidelines outline vulcraft s understanding of two possible approaches that may be taken concerning additional roof deck design requirements fm may require.

To access roofnav you must register. This may be all that is specified. Situation is i speced a roof customer emailed last night asking wind rating i spent hours trying to figure that out after hours. 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.

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. A roof assembly is tested to meet. New users can begin their free registration here. Include drawings and details of the roof cover flashing and design loads.

I m finding it much simpler just to use the manufacturer wind warranty options than screwing with all this fm stuff. 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. The following information is needed to conduct a thorough review of new roof installations and re roofing projects. 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.

Technical reports supporting code change. Roofnav can take the guesswork out of configuring an fm approved roofing system leaving you to focus on what matters most. Fm wind rating specified only.