Rated Roof Assemblies

Assembly rated class a roof coverings are those that meet class a standards when combined with other elements.

Rated roof assemblies.

The class a brand weighs 2 000 grams class b 500 grams and class c 9 1 4 grams. If the roof deck is combustible such as wood plywood or osb two additional tests must be conducted. Class a roof assemblies shall be permitted for use in buildings or structures of all types of construction. Dec 14 2011 7 zoning overlay requires roof wall stc 65.

Project is within an air force approach zone. Have a question about assemblies. 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. Find usg product specific cad and revit files.

Where the room side fire resistance rated membrane of. Reduce the spacing between rows of fasteners by using one intermediate row in zone 2 and zone 3. Helpful documents and resources for usg s roof assemblies can be found on this page. Use assembly that is rated to meet exceed each zone.

Floor ceiling assemblies yes ceiling roof no. Floor ceiling assembly below to the underside of the floor or roof sheathing slab or deck above or to the fire resistance rated floor ceiling or roof ceiling assembly above and shall be securely attached thereto. 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. Class a roof assemblies are those that are effective against severe fire test exposure.

Shaft wall limiting heights spans. Base sheet mechanically attached choose one. Sound transmission class stc rating. The brands consist of an ignited wood lattice placed directly on top of the test specimen.

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. Our cad and revit library of design drawings of wall intersections joints and other construction details. The stc rating shown reflects testing or evaluation of an assembly with one or more products under test conditions and may not apply to all products listed for each assembly. Use assembly that is rated to meet exceed zone 3 across the whole roof.

Both are burn through tests and the ultimate roof systems rating is the lowest of the three tests. All new fire rated roof ceiling assembly files. Joined oct 20 2009 messages 172 location tucson az.