Interior 1 Hour Fire Rated Wall Assembly

Intertek design lpb wpps 60 01 this intertek listed assembly is commonly used in 1 hour exterior walls along the property line including single family construction.

Interior 1 hour fire rated wall assembly.

The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. Descriptions of successfully tested i joist floor as. Two doors each with a fire protection rating of 1 1 2 hours installed on opposite side of the same opening in a fire wall shall be deemed equivalent in fire protection rating to one 3 hour door. This ul listed assembly is commonly used in type v multifamily construction in load bearing exterior walls.

According to the book commercial drafting and detailing a typical one hour fire rated wall consists of 2x4 studs spaced 16 inches from the center of one stud to the center of the next covered by 5 8 inch type x gypsum board. Use special fiberglass rated for use in firewalls. Lumber shall be identified by the grade mark of a lumber grading or inspection agency that has been approved by an accreditation body that complies with the american. Lumber shall be identified by the grade mark of a lumber grading or inspection agency that has been approved by an accreditation body that complies with the.

For testing requirements see section 715 4 3. 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. The fire rating of the wall assembly is the lower of the two. American softwood lumber standard ps 20.

Type of assembly required assembly rating hours minimum fire door fire assembly fire. Tested lumber wall assemblies are provided in table 1 for one hour fire resistance rated wall assemblies and table 2 for two hour fire resistance rated wall assemblies. Type x gypsum board is wallboard to which non combustible fibers have been added. Mount a 1 1 2 inch fiberglass barrier inside the studs.

These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. Use steel studs and two layers of 1 2 inch type c drywall on each side of the studs for a two hour fire rating on an interior wall. This assembly is fire rated for 1 hour from both sides. It also allows for the use of fiberglass insulation.

Table 1 for one hour rated wall assemblies and table 2 for two hour rated wall assemblies.