1
/2 in. UL Classified
Gypsum Wallboard (see
UL Rated Wall Design
for Additional Details)
2
1
/2 in. Min.
Stud or Runner
Damper
Sleeve
Angle Fastener
(see Section 2)
1
/2 in. UL Classified
Gypsum Wallboard (see
UL Rated Wall Design
for Additional Details)
Damper
Sleeve
Angle Fastener
(see Section 2)
2 1/2 in. Min.
Metal Stud
or Runner
Figure 1: 1 Hour Wall Rating
Figure 3: 1 Hour Wall Rating
Damper
Sleeve
Angle Fastener
(See Section 2)
2 1/2 in. min.
Stud or Runner
Two layers of 1/2 in. UL
Classified Gypsum
Wallboard (see UL
Rated Wall Design for
Additional Details)
Damper
Sleeve
Angle Fastener
2 1/2 in. min.
Metal Stud
or Runner
Two layers of 1/2 in. UL
Classified Gypsum
Wallboard (see UL
Rated Wall Design for
Additional Details)
Figure 2: 2 Hour Wall Rating
Figure 4: 2 Hour Wall Rating
1
/2 in. UL Classified
Gypsum Wallboard (see
UL Rated Wall Design
for Additional Details)
2
1
/2 in. Min.
Stud or Runner
Damper
Sleeve
Angle Fastener
(see Section 2)
Figure 6: 2 Hour Wall Rating
1
/2 in. UL Classified
Gypsum Wallboard (see
UL Rated Wall Design
for Additional Details)
2
1
/2 in. Min.
Stud or Runner
Damper
Sleeve
Angle Fastener
(see Section 2)
Figure 5: 1 Hour Wall Rating
• Drywall screws of a length such that the
screw engages the wood stud by 1¾ in.
(44mm) (wood framing).
• Steel anchors or self tapping concrete
screws penetrating masonry or block
1¼ in. (31mm).
• A minimum of two connections per side are
required. Additional connections must be
2. Securing the Damper/Sleeve Assembly to the Wall/Floor opening cont.......
made at a maximum of 12 in. (305mm) O.C.
(on center) maximum for openings of 48 in. W
x 36 in. H (1219mm x 914mm) and less, and 6
in. (152mm) O.C. (on center) for openings 80
in. W x 50 in. H (2032mm x 1270mm), 50 in. W
x 80 in. H (1270mm x 2032mm), and 40 in. W x
100 in. H (1016mm x 2540mm) or less.
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