Rated Roof Assemblies

Shaft wall limiting heights spans.

Rated roof assemblies. 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. Joined oct 20 2009 messages 172 location tucson az. Use assembly that is rated to meet exceed zone 3 across the whole roof. Helpful documents and resources for usg s roof assemblies can be found on this page.

The brands consist of an ignited wood lattice placed directly on top of the test specimen. Where the room side fire resistance rated membrane of. All new fire rated roof ceiling assembly files. If the roof deck is combustible such as wood plywood or osb two additional tests must be conducted.

Have a question about 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. Find usg product specific cad and revit files. 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.

Base sheet mechanically attached choose one. 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. Project is within an air force approach zone. Reduce the spacing between rows of fasteners by using one intermediate row in zone 2 and zone 3.

Both are burn through tests and the ultimate roof systems rating is the lowest of the three tests. Assembly rated class a roof coverings are those that meet class a standards when combined with other elements. Use assembly that is rated to meet exceed each zone. Dec 14 2011 7 zoning overlay requires roof wall stc 65.

Our cad and revit library of design drawings of wall intersections joints and other construction details. The class a brand weighs 2 000 grams class b 500 grams and class c 9 1 4 grams. Class a roof assemblies are those that are effective against severe fire test exposure. Class a roof assemblies and roof coverings shall be listed and identified as class a by an approved testing agency.

The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. Ultimately the design and detailing of the project assembly or system is the responsibility of a professional and all projects must comply with applicable building. 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.