Greenheck KFD - Manual

Part Number 462101

Installation Instruction Supplement

Refer to:
‘Installation Instructions for FD, DFD, SSFD, & KFD
Models’ (Part Number 452763)
or
‘Installation Instructions for FSD-XXX, DFD-XXX, CFSD-
XXX, & SSFSD-XXX Series Fire & Combination Fire
Smoke Dampers’ (Part Number 461336)
or
‘Installation Instructions for FD & DFD 150X Series
Curtain Fire Dampers’ (Part Number 453946) for
additional details.

Metal Stud Framing for Fire Dampers in
Drywall Partitions Utilizing One Retaining
Angle

FD & DFD Series

11/2 Hour Curtain Fire Dampers and

FSD Series

11/2 Hour Combination Fire Smoke Dampers
Vertical Mount

“UL Classified (see complete marking on

product)”
“UL Classified to Canadian safety standards (see
complete marking on product)”

Standards UL555 & UL555S

Classifications filed at UL under Listing R13317

Notes

1. Gypsum panels must be screwed 12 in. (305mm)

on center maximum to all stud and runner flanges
surrounding opening. (See

Figure 1

and

Figure 2

).

2. Fire damper and sleeve assemblies 80 in. W x 50 in. H

(2032mm x 1270mm), 50 in. W x 80 in. H (1270mm x
2032mm), or 40 in. W x 100 in. H (1016mm x 2540mm)
and smaller only require retaining angles on one side
of the partition (See

Figure 3

and

Figure 4

). Retaining

angles must be attached to the sleeve and the partition.
Larger damper assemblies require retaining angles on
both side of the partition. Retaining angles must be
attached to the sleeve.

• Retaining angles must be a minimum of 16 gauge

(1.5mm) steel and have a minimum of 11/2 in. x 11/2 in.
(38mm x 38mm) legs.

• Retaining angles must be attached to the sleeve using

one of the methods shown below:

• tack or spot welds

• #10 sheet metal screws and bolts

• Retaining angles must be attached to the partition using

drywall screws of a length such that the screw engages
the stud/track by a minimum of 1/2 in. (13mm).

• A minimum of two connections per side, top, and bottom,

12 in. (305mm) on center maximum for openings of
48 in. W x 36 in. H (1219mm x 914mm) and less, and 6 in.
(152mm) on center for openings 80 in. W x 50 in. H
(2032mm x 1270mm), 50 in. W x 80 in. H (1270mm x
2032mm), or 40 in. W x 100 in. H (1016mm x 2540mm)
or less.

• Retaining angles must overlap the partition a minimum of

1 in. (25mm).

Grille Installations

(Dampers up to 36 in. x 36 in.

[914mm x 914mm] maximum)
• Angle legs may be reversed and one leg inserted into the
wall/floor opening. Retaining angles used in conjunction
with grille installations must be a minimum of 16 gauge
(1.5mm) steel and have a minimum of 5/8 in. x 1 in.
(15mm x 25mm) of sleeve into the studs. Space screws a
maximum of 6 in. (152mm) on center and a maximum of
2 in. (51mm) from the corners (minimum of 2 screws per
side). See

Figure 5

and

Figure 6

.

Note: Screws used to attach grille are allowed to penetrate
reversed angle leg.

2

1

⁄

2

in. Min.

Runner

Screws

2

1

⁄

2

in.

Min. Stud

Figure 2: Section A-A

12 in.

24 in. o.c.

Maximum

Floor Runner

2 in.

Ceiling Runner

2 Panhead

Screws

24 in. o.c.

Maximum

(metal studs)

24 in. o.c.

Maximum

(metal studs)

16 in. o.c.

Maximum

(wood studs)

16 in. o.c.

Maximum

(wood studs)

2 in.

See Section A-A

Figure 1: Opening Preparation Detail

(Double

vertical studs are not required for openings 36 in. x
36 in. (914mm x 914mm) or smaller.