1 Hour Fire Rated Roof Assembly

Generic fire rated assembly listing construction elements 1 5 hr rating 1 hour notes 1.

1 hour fire rated roof assembly. Urb concealed grid system and tile. Fire rated wood frame wall and floor ceiling assemblies 5 ws4 1 1 one hour fire resistive wood frame wall assembly 2x4 wood stud wall 100 design load astm e 119 nfpa 251. 2 1 3 4 2. Concrete with cellular steel 3 hr.

The listed assemblies in this document may not contain all components of the approved assembly. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. Helpful documents and resources for usg s roof assemblies can be found on this page. Wood joists wood i joists floor trusses and flat or pitched roof trusses spaced a maximum 24 o c.

1 page august 26 2020 ultraply tpo roof systems tested assembly guide august 2020 it is the responsibility of the user of this document to verify the included assemblies in the charts below with the associated firm s ul fm etc. 276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. 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. An additional difference between the two assemblies is that p522 allows insulation in the cavity and rc2601 does not.

3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete. Framing nominal 2x4 wood studs spaced 16 in. Assemblies include ducts dampers lighting or other fixtures in the tested assembly. 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.

Ibctable 721 3 item 21 1 1 describes a single prescriptive 1 hour rated floor or roof assembly that includes wood trusses. The first is one layer gwb with metal furring strips or resilient channel and the second is two layers gwb board. Generally there are two types of 1 hour wood truss assemblies. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr.