Rated Roof Assemblies

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.

Rated roof assemblies.

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. Class a roof assemblies and roof coverings shall be listed and identified as class a by an approved testing agency. Find usg product specific cad and revit files.

Shaft wall limiting heights spans. Class a roof assemblies are those that are effective against severe fire test exposure. Project is within an air force approach zone. Both are burn through tests and the ultimate roof systems rating is the lowest of the three tests.

Joined oct 20 2009 messages 172 location tucson az. Reduce the spacing between rows of fasteners by using one intermediate row in zone 2 and zone 3. 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. The class a brand weighs 2 000 grams class b 500 grams and class c 9 1 4 grams.

Assembly rated class a roof coverings are those that meet class a standards when combined with other elements. Floor ceiling assemblies yes ceiling roof no. 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.

Class a roof assemblies shall be permitted for use in buildings or structures of all types of construction. Have a question about assemblies. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. 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.

If the roof deck is combustible such as wood plywood or osb two additional tests must be conducted. Use assembly that is rated to meet exceed zone 3 across the whole roof. Dec 14 2011 7 zoning overlay requires roof wall stc 65. Sound transmission class stc rating.

Base sheet mechanically attached choose one. The brands consist of an ignited wood lattice placed directly on top of the test specimen. All new fire rated roof ceiling assembly files.