Fire Rated Roof Assembly

Fire rated wall floor and ceiling assemblies provide the necessary fire and smoke barriers to create compartmentalization during a fire safeguarding against the spread of fire and smoke within a building or to and from a building.

Fire rated roof assembly. 2 hour exterior wall assembly ul design no. Helpful documents and resources for usg s roof assemblies can be found on this page. Shaft wall limiting heights spans. 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.

V337 2 hour interior wall assembly ul design no. Lp flameblock fire rated osb sheathing is a component of the following code compliant fire rated assemblies. Building with fire safety in mind. Concrete with cellular steel 3 hr.

These assemblies need to meet fire and smoke safety and environmental sustainability requirements. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete. Some are reluctant to rely on test results from flat parallel chord trusses applied to sloped roof trusses. 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.

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. Our cad and revit library of design drawings of wall intersections joints and other construction details. Urb concealed grid system and tile. A question has come up concerning sloped roof trusses and fire assembly ratings.

The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. 276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. Assembly rated class a roof coverings are those that meet class a standards when combined with other elements. The code requirements for fire resistance of metal panels are logical and not overly burdensome.

12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr. Most metal panel manufacturers have tested their roof assemblies and most if not all metal panels and shingles can be used in class a fire rated roof systems.