FREEDOM
®
RESIDENTIAL
SPRINKLER
INSTALLATION GUIDE
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: [email protected]
Form No. F_080190 18.10.25 Rev 16.1.P65
AVOIDING OBSTRUCTIONS TO SPRINKLER DISCHARGE
(Obstruction rules for residential sprinklers are found in section 8.10 of the 2010 edition of NFPA 13.)
Positioning Residential Pendent Sprinklers - Obstructions at the Ceiling
A
B
Residential pendent sprinklers may be
located on opposite sides of continuous
obstructions up to 4 ft. (1.2 m) wide at the
ceiling, as long as the distance from the
centerline of the obstruction to the sprinklers
(A) does not exceed one-half the maximum
spacing allowed between sprinklers.
Positioning Residential Pendent Sprinklers - Obstructions Along Walls
A
B
(A) Distance from centerline of sprinkler to side of obstruction.
(B) Distance from deflector to bottom of obstruction.
(C) Width of the obstruction.
Obstructions up to 30 in. (.8 m) wide (C)
located against the wall are permitted
to be protected when (A) is greater than
or equal to (C) minus 8 in. (.2 m) plus (B).
C < 30 in. for metric C < .8 m
A > (C - 8 in.) + B A > (C - .2 m) + B
A
A
B
A
Distance from Sprinkler
to Side of Ceiling
Obstruction (Dimension A)
Maximum Distance from
Deflector to Bottom of Ceiling
Obstruction (Dimension B)
Inches
mm
Less than 1 ft. 6 in.
(Less than 457 mm)
0
0
1 ft. 6 in. to less than 3 ft.
(457 mm to less than .94 m)
1
25.4
3 ft. to less than 4 ft.
(.91 m to less than 1.2 m)
3
76
4 ft. to less than 4 ft. 6 in.
(1.2 m to less than 1.37 m)
5
127
4 ft. 6 in. to less than 6 ft.
(1.37 m to less than 1.8 m)
7
178
6 ft. to less than 6 ft. 6 in.
(1.8 m to less than 2 m)
9
229
6 ft. 6 in. to less than 7 ft.
(2 m to less than 2.1 m)
11
279
7 ft. or greater
(2.1 m or greater)
14
356
C
Sprinkler RES12
4’ Max.