1 Hour Rated Wood Roof Assembly

Ibc section 722 6 could be used to calculate up to a 1 hour rating for a wood frame wall floor or roof assembly.

1 hour rated wood roof assembly.

Wood joists supporting 1 25 4 mm nominal wood subfloor and 1 25 4 mm nominal wood finish floor or 19 32 15 1 mm plywood finished floor with long edges t g and 15 32 11 9 mm interior plywood with exterior glue subfloor perpendicular to joist with joints staggered. Gypsum wallboard roof ceilings wood framing pitched roof truss 11 1 hr. 1 one hour and two hour rated assemblies that may be used in the roof cavity and that may be constructed with gable end frames. 6 usg fire resistant assemblies test certification test conditions and fire and sound tested assemblies listed in this selector are based on characteristics properties and performance certificationof materials and systems obtained under controlled test conditions as set forth in the appropriate astm standard in effect at the time of test.

See full report for details. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. Descriptions of successfully tested i joist floor as. 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.

Wood joists wood i joists floor trusses and flat or pitched roof trusses spaced a maximum 24 o c. No minimum joist size is given except that it needs to be adequate for structural loads. Fire resistance rated truss assemblies. American softwood lumber standard ps 20.

For details about rated truss assemblies see sbca research report 1509 01. Screw fastened perpendicular to lower chord of wood trusses of 2 x 4 38 mm x 89 mm. 276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. Concrete with cellular steel 3 hr.

With 1 2 wood structural panels with. There is no tested assembly that matches in all regards. Ibc table 722 6 2 2 allows 10 minutes for wood floor or roof joists at 16 o c. One hour roof ceiling assembly.

Table 1 for one hour rated wall assemblies and table 2 for two hour rated wall assemblies. Wood truss council of america floor or roof fire notes 1. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete. Ibc table 721 3 item 21 1 1 describes a single prescriptive 1 hour rated floor or roof assembly that includes wood trusses.

In addition sbca s metal plate connected wood truss handbook is a comprehensive reference book that contains information about. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. These listings are short summaries to serve as a. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr.