4
Roof Span*
Flow
Pressure
Sprinkler
(ft)
***
(gpm)
(psi)
K-Factor
Pitch
BB1-
17
⁄
32
60
(or less)
38
23.7
7.8
4:12
to less than 7:12
BB2-
17
⁄
32
60
(or less)
38
23.7
7.8
7:12
to less than 10:12
BB3-
17
⁄
32
60
(or less)
40
26.3
7.8
10:12
to
12:12
BB1
60
(to more than 40)
38
46.0
5.6
4:12
to less than 7:12
BB2
60
(to more than 40)
38
46.0
5.6
7:12
to less than 10:12
BB3
60
(to more than 40)
38
46.0
5.6
10:12
to
12:12
BB1
40
(or less)
25
20.0
5.6
4:12
to less than 7:12
BB2
40
(or less)
25
20.0
5.6
7:12
to less than 10:12
BB3
40
(or less)
25
20.0
5.6
10:12
to
12:12
SD1
40
(to more than 30)
35
39.0
5.6
4:12
to less than 7:12
SD2
40
(to more than 30)
35
39.0
5.6
7:12
to less than 10:12
SD3
40
(to more than 30)
35
39.0
5.6
10:12
to
12:12
SD1
30
(to more than 10)
25
20.0
5.6
4:12
to less than 7:12
SD2
30
(to more than 10)
25
20.0
5.6
7:12
to less than 10:12
SD3
30
(to more than 10)
25
20.0
5.6
10:12
to
12:12
SD1
10
(or less)
19
11.5
5.6
4:12
to less than 7:12
SD2
10
(or less)
19
11.5
5.6
7:12
to less than 10:12
SD3
10
(or less)
19
11.5
5.6
10:12
to
12:12
HIP
**28
(to more than 20)
34
36.9
5.6
4:12
to less than 12:12
HIP
**20
(or less)
25
20.0
5.6
4:12
to
12:12
Attic Sprinkler™ Design Data
* This is the span as measured horizontal, not along the slope as shown in figure 1.
** The HIP sprinkler spacing is measured as shown in figure 12.
*** For BB and HIP sprinklers in attics greater than 60' and equal or less than 80' see Figures 13 & 14.
OBSOLETE
