TFP540
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UL and C-UL Specific Application
Listing Requirements for
Installation Under Concrete Tees
TYCO Series DS-2 Dry-Type Pendent
Sprinklers (TY5238) have a UL and
C-UL Specific Application Listing for
use under concrete tees when installed
as follows:
• Stems of the concrete tee construc-
tion must be spaced at less than 7.5
feet (2,3 m) on center but more than
3 ft (0,9 m) on center. The depth of
the concrete tees must not exceed
30 in. (762 mm). The maximum per-
mitted concrete tee length is 32 ft
(9,8 m). However, where the con-
crete tee length exceeds 32 ft (9,8
m), non-combustible baffles, equal
in height to the depth of the tees, can
be installed to ensure that the space
between the tees does not exceed
32 ft (9,8 m) in length.
• Sprinkler deflectors are to be located
in a horizontal plane at or above 1 in.
(25,4 mm) below the bottom of the
concrete tee stems.
• When sprinkler deflectors are located
higher than a horizontal plane 1 in.
(25,4 mm) beneath the bottom of the
concrete tee stems, obstruction to
sprinkler discharge criteria require-
ments of NFPA 13 for extended cov-
erage upright sprinklers applies.
Ambient Temperature
Exposed to
Discharge End of Sprinkler
Temperatures for Heated Area
(1)
40°F
(4°C)
50°F
(10°C)
60°F
(16°C)
Minimum Exposed Barrel Length
(2)
,
Inches
(mm)
40°F
(4°C)
0
0
0
30°F
(-1°C)
0
0
0
20°F
(-7°C)
4
(100)
0
0
10°F
(-12°C)
8
(200)
1
(25)
0
0°F
(-18°C)
12
(305)
3
(75)
0
-10°F
(-23°C)
14
(355)
4
(100)
1
(25)
-20°F
(-29°C)
14
(355)
6
(150)
3
(75)
-30°F
(-34°C)
16
(405)
8
(200)
4
(100)
-40°F
(-40°C)
18
(455)
8
(200)
4
(100)
-50°F
(-46°C)
20
(510)
10
(255)
6
(150)
-60°F
(-51°C)
20
(510)
10
(255)
6
(150)
Notes:
1. For protected area temperatures that occur between values listed above, use the next cooler temperature
2. These lengths are inclusive of wind velocities up to 30 mph (18,6 kph).
Response
Rating
Coverage Area
(4)
,
ft x ft
(m x m)
Minimum Flow
(1)
Light Hazard
(2)
,
(0.10 gpm/ft
2
)
gpm
(Lpm)
Minimum Flow
(1)
Ordinary Hazard
Group I
(3)
,
(0.15 gpm/ft
2
)
gpm
(Lpm)
Minimum Flow
(1)
Ordinary Hazard
Group II
(3)
,
(0.20 gpm/ft
2
)
gpm
(Lpm)
Escutcheon
Type
Quick
16 x 16
(4,9 x 4,9)
30
(114)
—
—
Flush, Recessed,
Extended
Quick
18 x 18
(5,5 x 5,5)
33
(125)
—
—
Flush, Extended
Standard
5
20 x 20
(6,1 x 6,1)
40
(151)
—
—
Flush, Recessed,
Extended
Quick
14 x 14
(4,3 x 4,3)
—
30
(148)
39
(148)
Flush, Recessed,
Extended
Standard
16 x 16
(4,9 x 4,9)
—
39
(148)
51
(193)
Flush, Recessed,
Extended
Notes:
1. Requirement is based on minimum flow in gpm from each sprinkler. The required residual pressure is to based on the use of a K-factor derived from Table D.
2. Light Hazard Occupancies are limited to a type of unobstructed construction consisting of flat, smooth ceilings.
3. Ordinary Hazard Occupancies may have either “combustible or non-combustible, unobstructed ceiling construction” or “noncombustible obstructed ceiling construction.”
4. Minimum spacing between sprinklers is 12.5 ft (3,8 m).
5. For retrofit applications of projects installed prior to the NFPA Quick Response / Light Hazard requirement
TABLE C
EXPOSED SPRINKLER BARRELS IN WET PIPE SYSTEMS
MINIMUM RECOMMENDED LENGTHS
TABLE B
UL AND C-UL LISTING
COVERAGE AND FLOW RATE CRITERIA
