Rated Roof Assemblies

5 8 15 9 mm toughrock fireguard c gypsum board or 5 8 densarmor plus fireguard c gypsum panels applied perpendicular to resilient channels 24 o c.

Rated roof assemblies.

For example shake roofing with a fire retardant treatment rates class b on its own but achieves a class a rating when combined with specified underlying materials such as type 72 roll roofing material. Not all ul rated assemblies that use firestone roofing products are eligible for the firestone red shield red shield medallion or platinum warranty. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire rated ceiling assembly.

Astm e108 defines fire test methods for roof coverings. As applied to elements of buildings the fire resistance rating classifies the ability of an assembly to confine and isolate fire within a zone comprised of fire resistance rated walls ceiling and floor assemblies. These tests may be conducted at ul inc fm global or any other certified testing laboratory. E108 defines the following conditions.

610 mm with 1 25 4 mm type s drywall screws 12 305 mm o c. The maximum flame spread is 6 feet for a class a rated roof 8 feet for class b and 13 feet for class c. Helpful documents and resources for usg s roof assemblies can be found on this page. The firestone standards guidelines and specifications regarding roofing system components and attachment for the warranty desired must be followed.

Here you can find drawings for our ul fire rated floor assemblies and ul fire rated ceiling assemblies. As applied to elements of buildings the fire resistance rating classifies the ability of an assembly to confine and isolate fire within a zone comprised of fire resistance rated walls ceiling and floor assemblies. Fire partitions must extend from the top of the floor below to the underside of the floor or roof sheathing or to the underside of the fire resistance rated floor ceiling or roof ceiling assembly above. The reduction can also apply when code allows for a corridor wall to be a 30 minute assembly.

Have a question about assemblies. Assembly rated class a roof coverings are those that meet class a standards when combined with other elements. Refer to our roof ceiling assembly documents which includes ul fire rated roof assemblies for easy guidance through the assembly of a roof or ceiling on your next project.