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H5.1 One-and Two-Family Dwellings.
The minimum fire flow and flow duration
requirements for one- and two-family dwellings having a fire area that
does not exceed 3600 ft2 (334.5 m2)
shall be 1000 gpm (3785 L/m) for 1 hour. Fire flow and flow
duration for dwellings having a fire area in excess of 3600 ft2
(334.5 m2) shall not be less than that specified in Table
H.5.1.
| Table H.5.1 Minimum Required Fire
Flow and Flow Duration for Buildings |
|
Fire Area ft2 (×0.0929 for m2) |
|
|
|
i
Building Construction Types
i
(Click link for reference) |
Fire Flow
gpm2 (× 3.785 for L/min) |
Flow Duration
(hours) |
| I(443),I(332), II(222)1 |
II(111), III(211)1 |
IV(2HH), V(111)1 |
II(000),III(200), III(000)1 |
V(000)1 |
|
Duration |
|
|
|
|
|
2 |
| (hours) |
|
|
|
|
|
| 0–22,700 |
0–12,700 |
0–8,200 |
0–5,900 |
0–3,600 |
1,500 |
| 22,701–30,200 |
12,701–17,000 |
8,201–10,900 |
5,901–7,900 |
3,601–4,800 |
1,750 |
| 30,201–38,700 |
17,001–21,800 |
10,901–12,900 |
7,901–9,800 |
4,801–6,200 |
2,000 |
| 38,701–48,300 |
21,801–24,200 |
12,901–17,400 |
9,801–12,600 |
6,201–7,700 |
2,250 |
| 48,301–59,000 |
24,201–33,200 |
17,401–21,300 |
12,601–15,400 |
7,701–9,400 |
2,500 |
| 59,001–70,900 |
33,201–39,700 |
21,301–25,500 |
15,401–18,400 |
9,401–11,300 |
2,750 |
| 70,901–83,700 |
39,701–47,100 |
25,501–30,100 |
18,401–21,800 |
11,301–13,400 |
3,000 |
3 |
| 83,701–97,700 |
47,101–54,900 |
30,101–35,200 |
21,801–25,900 |
13,401–15,600 |
3,250 |
| 97,701–112,700 |
54,901–63,400 |
35,201–40,600 |
25,901–29,300 |
15,601–18,000 |
3,500 |
| 112,701–128,700 |
63,401–72,400 |
40,601–46,400 |
29,301–33,500 |
18,001–20,600 |
3,750 |
| 128,701–145,900 |
72,401–82,100 |
46,401–52,500 |
33,501–37,900 |
20,601–23,300 |
4,000 |
4 |
| 145,901–164,200 |
82,101–92,400 |
52,501–59,100 |
37,901–42,700 |
23,301–26,300 |
4,250 |
| 164,201–183,400 |
92,401–103,100 |
59,101–66,000 |
42,701–47,700 |
26,301–29,300 |
4,500 |
| 183,401–203,700 |
103,101–114,600 |
66,001–73,300 |
47,701–53,000 |
29,301–32,600 |
4,750 |
| 203,701–225,200 |
114,601–126,700 |
73,301–81,100 |
53,001–58,600 |
32,601–36,000 |
5,000 |
| 225,201–247,700 |
126,701–139,400 |
81,101–89,200 |
58,601–65,400 |
36,001–39,600 |
5,250 |
| 247,701–271,200 |
139,401–152,600 |
89,201–97,700 |
65,401–70,600 |
39,601–43,400 |
5,500 |
| 271,201–295,900 |
152,601–166,500 |
97,701–106,500 |
70,601–77,000 |
43,401–47,400 |
5,750 |
| 295,901–Greater |
166,501–Greater |
106,501–115,800 |
77,001–83,700 |
47,401–51,500 |
6,000 |
| 295,901–Greater |
166,501–Greater |
115,801–125,500 |
83,701–90,600 |
51,501–55,700 |
6,250 |
| 295,901–Greater |
166,501–Greater |
125,501–135,500 |
90,601–97,900 |
55,701–60,200 |
6,500 |
| 295,901–Greater |
166,501–Greater |
135,501–145,800 |
97,901–106,800 |
60,201–64,800 |
6,750 |
| 295,901–Greater |
166,501–Greater |
145,801–156,700 |
106,801–113,200 |
64,801–69,600 |
7,000 |
| 295,901–Greater |
166,501–Greater |
156,701–167,900 |
113,201–121,300 |
69,601–74,600 |
7,250 |
| 295,901–Greater |
166,501–Greater |
167,901–179,400 |
121,301–129,600 |
74,601–79,800 |
7,500 |
| 295,901–Greater |
166,501–Greater |
179,401–191,400 |
129,601–138,300 |
79,801–85,100 |
7,750 |
| 295,901–Greater |
166,501–Greater |
191,401–Greater |
128,301–Greater |
85,101–Greater |
8,000 |
|
1 Types of construction are based
on NFPA 220.
2 Measured at 20 psi (139.9 kPa).
|
| Exception: A reduction in required fire
flow of 50 percent, as approved, shall be permitted when the
building is provided with an approved automatic sprinkler
system. |
| |
| H.5.2 Buildings Other Than One- and
Two-Family Dwellings. The minimum fire flow and flow duration
for buildings other than one- and two-family dwellings shall be
as specified in Table H.5.1. |
| H.5.2.1 A reduction in required fire flow of
up to 75 percent, as approved, shall be permitted when the
building is protected throughout by an approved automatic
sprinkler system. The resulting fire flow shall not be less than
1000 gpm (3785 L/min.). |
| H.5.2.2 A reduction in required fire flow of
up to 75 percent, as approved, shall be permitted when the
building is protected throughout by an approved automatic
sprinkler system, which utilizes quick response sprinklers
throughout. The resulting fire flow shall not be less than 600
gpm (2270 L/min). |
| |
| ©
NFPA |
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