FD & DFD Series

Part #462102

INSTALLATION INSTRUCTION SUPPLEMENT

Refer to:

‘Installation Instructions for FD, DFD, SSFD, & KFD Models’ (Part #452763)

‘Installation Instructions for FSD-XXX,DFD-XXX, & CFSD-XXX,SSFSD-XXX Series Fire & Combination Fire Smoke Dampers’ (Part #461336)

‘Installation Instructions for FD & DFD 150X Series Curtain Fire Dampers’ (Part #453946) for additional details.

Notes

1.	Gypsum panels must be screwed 12 in. (305mm) on center
	maximum to all stud and runner flanges surrounding
	opening. (See Figure 1 for Opening Preparation Details).
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 2 and
	Figure 3). Retaining angles must be attached to the

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

11/2 Hour Curtain Fire Dampers and

FSD & SSFSD 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 UL 555 & 555S Classifications Filed at UL under Listing #R13317

sleeve and the partition. Larger damper assemblies require

retaining angles on both sides 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 21/2 in. legs

(38mm x 63mm).

• 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 by a minimum of 1 3/4 in. (44mm)

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

12 in. (305mm) O.C. maximum for openings of

48 in. W x 36 in. H (1219mm x 914mm) and less, and

6 in. (152mm) O.C. for openings 80 in. W x 50 in. H

(2032mm x 1270mm), 50 in. W x 80 in. H,

12 in.

24 in. o.c. Maximum

24 in. o.c.	24 in. o.c.	Ceiling Runner
Maximum	Maximum	Ceiling Runner
Maximum	Maximum
(metal studs)	(metal studs)
		2 in.
	2 Panhead
	Screws	2 in.
		2 in.
16 in. o.c.	16 in. o.c.
Maximum	Maximum
(wood studs)	(wood studs)

(1270mm x 2032mm) and 40 in. W x 100 in. H

(1016mm x 2540mm)or less.

• Retaining angles must overlap the partition a minimum of

1 in. (25mm)

Floor Runner

Figure #1: Opening Preparation Detail (double vertical studs are not required for openings 36 in. x 36 in. [914mm x 914mm] or smaller)

Damper

Sleeve

2 1/2 in. Min.

Stud or Runner

1/2 in. UL Classified

Gypsum Wallboard (see

UL Rated Wall Design

for Additional Details)

Angle Fastener (see Note 2)

11⁄2 in. x 21⁄2 in.

16 ga. angle

Figure #2: 1 Hour Wall Rating