Preparation of Openings
• Frame wall openings as shown below (
see Figure 1, 2, & 2A
).
• Gypsum wall board must be fastened 12 in. (305 mm) on center (O.C.) to all stud and runner flanges surrounding
opening
(see Figure 1, 2, & 2A
).
• Prepare opening between studs and sleeve assembly as shown below (
see Figure 3 & 4
).
• All construction and fasteners must meet the requirements of the appropriate wall design (See UL Fire Resistance
Directory) and/or local codes.
Second set of studs are not required on openings
36 in. x 36 in. (914mm x 914mm) or smaller.
Metal stud only
Figure 2
Second set of studs are not required on openings
36 in. x 36 in. (914mm x 914mm) or smaller.
Metal stud only
Figure 1
Floor Runner
Ceiling Runner
24 in. O.C.
Maximum
24 in. O.C.
Maximum
24 in. O.C.
Maximum
24 in. O.C.
Maximum
2 in.
2 in.
12 in.
2 Panhead
Screws
Ceiling
Runner
Detail
A-A
Floor
Runner
24 in. (610mm)
O.C. Max.
Figure 2A
Out of Wall Fire and Combination Fire Smoke Dampers
3
®
