Preparation Of Openings - Greenheck DFD Series Installation, Operation And Maintenance Manual

Preparation of Openings

• Frame wall openings as shown below (see Figure 1, 2, and 2A).
• Gypsum wall board must be fastened 12 in. (305 mm) on center to all stud and runner flanges surrounding opening.
• 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.
24 in. o.c.
Maximum
(metal studs)
12 in.
24 in. o.c.
Maximum
16 in. o.c.
Maximum
(wood studs)
Floor Runner
Figure 1
Metal Stud Construction
Gypsum Wallboard
(610mm)
24 in. (610mm)
O.C. max.
O.C. Max.
Retaining
Angle
In metal stud construction,
Damper
exposed steel surfaces need
Sleeve
not be covered with gypsum
wallboard.
Figure 2A
Wooden Stud Construction
Gypsum Wallboard
Retaining
Angle
In wood stud construction,
Damper
Sleeve gypsum wallboard must cover
all wood stud surfaces.
Figure 3 (2 sided angle installation shown)
®
24 in. o.c.
Ceiling Runner
Maximum
(metal studs)
2 in.
2 panhead
screws
2 in.
16 in. o.c.
Maximum
(wood studs)
Second set of studs are not required on openings
36 in. x 36 in. (914mm x 914mm) or smaller.
Detail
A-A
24 in.
Stud or Runner
1 in. Min.
Metal stud only
Stud or Runner
1 in. Min.
Second set of studs are not required on openings
36 in. x 36 in. (914mm x 914mm) or smaller.
24 in.
(610mm)
O.C. max.
Figure 2
Ceiling
Runner
Ceiling
Runner
Metal Stud
Framing Shown
Detail
A-A
Floor
Runner
Floor
Runner
Retaining
Angle
Damper
Sleeve
Figure 4 (2 sided angle installation shown)
Detail
A-A
Metal stud only
Notched Piece
Bent Down
Detail A-A
Metal Stud Construction
Gypsum Wallboard
Stud or Runner
In metal stud construction,
exposed steel surfaces need
not be covered with gypsum
wallboard.
Curtain Fire Dampers
Wooden Stud Construction
Notched P
Ceiling
Bent Dow
Runner
Metal Stud
Framing Shown
Floor
Runner
1 in. Min.
3