Fm Global Roof Ratings

A roof assembly is tested to meet.

Fm global roof ratings. 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. Roof projects new fm global reviews roof plans to determine resistance to anticipated wind uplift pressures and fire spread potential. Include drawings and details of the roof cover flashing and design loads. Situation is i speced a roof customer emailed last night asking wind rating i spent hours trying to figure that out after hours.

Fm wind rating specified only. New users can begin their free registration here. Roofnav can take the guesswork out of configuring an fm approved roofing system leaving you to focus on what matters most. 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.

Technical reports supporting code change. The research is also used to enhance external standards. 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. I m finding it much simpler just to use the manufacturer wind warranty options than screwing with all this fm stuff.

The following guidelines outline vulcraft s understanding of two possible approaches that may be taken concerning additional roof deck design requirements fm may require. The registration process is free and only takes a few minutes to complete. 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. 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.

The following information is needed to conduct a thorough review of new roof installations and re roofing projects. This may be all that is specified. To access roofnav you must register.