2 Hour Rated Roof Assembly

Fire rated assemblies are tested and certified in their entirety.

2 hour rated roof assembly. Sound tested with 2 x 4 stud wall with 1 2 12 7 mm toughrock fireguard c gypsum wallboard or densarmor plus fireguard c panels each side of assembly and 3 1 2 89 mm fiberglass insulation in stud space both. Table 2 two hour fire rated loadbearing wood frame wall assemblies assemblies rated from both sides studs insulation sheathing on both sides fasteners details 2x6 24 o c. Wood floor ceiling 2 hour 2 x 6 f d joists 16 o c. Code 15 2 is used to determine the ability of a roof system to hinder the horizontal spread or vertical penetration of an external fire source.

Where the weight of lay in ceiling panels used as part of fire resistance rated floor ceiling or roof ceiling assemblies is not adequate to resist an upward force of 1 pound per square foot 48 pa wire or other approved devices shall be installed. W 1 x 8 wood planking 2 layers 1 2. Roof ceiling assemblies helpful documents and resources for usg s roof assemblies can be found on this page. An mbmabuilding with a fire rated roof assembly places the metal building in a totally new class of construction with the following advantages.

One basis for this type of analysis is harmathy s ten rules of fire endurance rating written in 1965. A two hour assembly has been calculated and a copy of the report is available from sbca sbca srr 1509 02. In new construction the entire floor assembly is often use to achieve the rating. Code regulations are consolidated by state and city for easier navigation.

To take advantage of these fire rated roof systems one should make a. 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. Explore a searchable database of us construction and building code. In accordance with these standards all classified roof covering assemblies fall into one of the three.

However the gypsum association manual has a new note for certain assemblies.