1 Hour Fire Rated Wall Construction

Type x gypsum board is wallboard to which non combustible fibers have been added.

1 hour fire rated wall construction.

Walls less than 5 feet from the property lot line must be of a listed hour fire1 resistant construction. This assembly is fire rated for 1 hour from the interior side only except when brick is the exterior facing. Mount a 1 1 2 inch fiberglass barrier inside the studs. When item 7b steel framing members is used nonbearing wall rating is limited to 1 hr.

Thickness of insulation item 4 is 3 in and two layers of gypsum board panels 1 2 in. To an imaginary line between two buildings on the lot. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. Where to install type x drywall.

To the centerline of a street an alley or public way. The fire resistant rating also requires the rating exposure to be for both sides. A typical one hour fire rated wall assembly approved by universal laboratories consists of 2 x 4 inch wood wall studs and r 13 glass fiber insulation faced with a vapor retarding foil filling the cavities. Stud depth is 3 1 2 in min.

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. It also providesbetter substrate for securely fastening exterior facing materials. Thick shall be attached to furring channels as described in item 6. Use special fiberglass rated for use in firewalls.

Building code requirements. To the closest interior lot line. 7 alternate based on 2 1 2 gauge steel studs and 1 2 face layer laminated ga wp 105153ngc 2318 based on 2 glass fiber. For this reason a fire rated drywall is sometimes called one hour fire wallboard.

1 hour fire rated construction non loadbearing acoustical performance reference construction detail description test number stc test number index wt. For occupancies such as stores apartments of fices and other commercial and industrial uses build ing codes commonly require floor ceiling and wall assemblies to be fire resistance rated in accordance with standard fire tests. When specified for these 1 hour fire rated assemblies lp flameblock sheathing reduces dead load and wall thickness versus common alternatives. Fire rated wood frame wall and floor ceiling assemblies.