HomeMy WebLinkAboutFire Flow CalcCOLLEGE STATION UTILITIES EXPANSION
CITY OF COLLEGE STATION
JC JOB #C0013-014-00
FIRE FLOW CALCULATION
CALCULATED FLOW
Fire Flow at hydrant Q-037:
With 20-psi pressure at Static Hydrant Q-038: ? 4k .. of T ekASllll
0 *:
P001
Q,. = 29.83cd P ............. .......
/ STEVE E. DUNCAN
Q.=(29.83)(0.9)(2.5)Z 67 =1,373 gpm �.......................
83252
(PS
— 20)0.54 ll+ p� </CE v,G\��v�.!
Qf = Qr—
PS — Pr
0.54 ZI y) I I
Qf=(1373)98-20) =6,827 gpm x 1
(98-94
Where:
Q,.= residual flow at the pitot pressure (gpm)
Q f = Fire Flow (gpm)
Cs = friction loss (usually 0.9 for smooth 2.5-in opening)
D = diameter of opening in inches (2.5 inmost cases)
PP = pitot pressure (psig)
P,. = residual pressure (psig)
P = static pressure (psig)
REQUIRED FLOW
Building Type = IIB (Section 602 and 1505 of 2006International Building Code)
Fire Area = 3,000 square feet (Section B 104 of 2006International Fire Code)
Required Fire Flow = 1,500 gpm (Table B 105.1 of 2006International Fire Code)
Number of hydrants required = 1 (Table C105.1 of 2000International Fire Code)
RESULTS
6,827 gpm available > 1,500 gpm required = OK
1 hydrants available = 1 hydrants required = OK
oll go Station Utilities
Reliable, Affordable, Community Owned
Date 4-Jan-11
Time 1530
Location 1601 GRAHAM RD
Nozzle size 2.5
Flow hydrant Q 037
Pitot reading 67
G.P.M. 1375
Static hydrant Q 038
Static PSI 98
Residual PSI 94
Comments
APPENDIX B
TABLE B105A
MINIMUM RFDI IIRPD RIRF-EI raw nNn FI nul nl IR nrinu me rum n,.,n c.
FIRE -FLOW CALCULATION AREA (square feet)
Fns par OW
(gallons -FLOW
FLOW DURATION
(homy)
Type lA and 186
Type IIA and 1114^
Type IV and V-Aa
Type and 11104
YP
YP
Type
0-22,700
0-12,700
0-8,200
0-5,900
0-3,600
11500
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
2,0D0
38,701-48,300
21,801-24,200
12,901-17,400
9,801-12,600
6,201-7,700
2,250
2
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
25,501-3g100
18,401-21,800
11,301-13,400
3,000
83,701-97,700
47,101-54,900
30,101-35,200
21,801-25,900
13,401-15,600
31250
97,701-112,700
54,901-63,400
35,201-40,600
25,901-29,300
15,601-18,000
3,500
3
112,701-128,700
63,401-72,400
40,601-46,400
29,301-33,500
18,001-20,60D
3,750
128,701-145,900
72,401-82,100
46,401-52,500
33,501-37,900
20,601-23,300
4,000
145,901464,200
82.101-92,400
52,501-59,100
37,901-42,700
23,301-26,300
4,250
164,201-183,406
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
203,701425,200
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 2ti6
139,401-152;604-
8M01-97,7�—
, O1
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-Grealer
106,501-115,800
77,001-83,700
47,401-51,500
6,000
4
—
—
115,801-125,500
83,701-90,600
51,501-55,700
6,250
—
—
125,501-135,500
90,601-97,900
55,701-60,20D
6,500
—
—
135,501.145,800
97.901-106,800
60,201-64,800
6,750
—
—
145,801-156,700
106,801-113,200
64.801.69,600
7,000
—
—
156,701-167,900
113,201-121,300
69,601-74,600
7,250
—
—
167,901-179,400
121,301-129,600
74,601-79,800
7,500
—
—
179,401-191,400
129,601-138,300
79,801-85,100
7,750
—
—
191,401-Greater
138,301-Greater
85,101-Greater
8,000
For 81: 1 square foot=0.0929m`, I gallon permineW =3.785 Lm, 1 pound per square inch = 6.895kP,,
a. The minimum required Era flow shall be allowed to he reduced by 25 percent for Group R.
b. Types of construction are based on thelaternafionalBuilding Code.
c. Measured at 20psi.
304 - 20051NTERNATIONAL FIRE CODE®
APPENDIX C
FIRE HYDRANT LOCATIONS AND DISTRIBUTION
The provisions contained in this appendix are not mandatory unless specifically referanced in the adopting ordinance.
SECTION C101
GENERAL
C101.1 Scope. Fire hydrants shall be provided in accordance
with this appendix for the protection of buildings, or portions
Of buildings, hereafter constructed.
SECTION C102
LOCATION
C102.1 Fire hydrant locations. Fire hydrants shall be pro-
vided along required fire apparatus access roads and adjacent
public streets.
SECTION C103
NUMBER OF FIRE HYDRANTS
C103.1 Fire hydrants available, Theminimnm number of fire
hydrants available to a building shall Rothe less than that listed
in Table C1051. The number of fire hydrants available to a
complex or subdivision shall not be less than that determined
by spacing requirements listed in Table C105.1 when applied
to fire apparatus access roads and perimeterpublic streets from
which fire operations could be conducted.
SECTION C104
CONSIDERATION OF EXISTING FIRE HYDRANTS
C104.1 Existing fire hydrants. Existing fire hydrants on pub-
lic streets are allowed to be considered as available. Existing
fire hydrants on adjacent properties shall not be considered
available unless fire apparatus access roads extend between
properties and easements areestablished to prevent obstruction
of such roads.
SECTION 0105
DISTRIBUTION OF FIRE HYDRANTS
C105.1 Hydrant spacing. The average spacing between fire
hydrants shall not exceed that listed in Table C105.1.
Exception: The fire chief is authorized to accept a defi-
ciency of up to 10 percent where existing fire hydrants pro-
vide all or a portion of the required fire hydrant service,
Regardless of the average spacing, fine hydrants shall be
located such that allpoints on streets and accessroads adjacent
to a building are within the distances listed in Table C105.1.
TABLE 0105.1
NI INI AMD nmycoo nnnv ne ve.v w....
FIRE -FLOW REQUIREMENT
(spin)
MINIMUM NUMBER
OFHYDRANTS
AVERAGESPACING
BETWEEN HYDRANTS^a•°
(feel
MAXIMUM DISTANCE FROM
ANY POINT ON STREET OR ROAD
FRONTAGE TO A HYDRANN
1,750 or less
1
500
250
2,000-2,250
2
450
225
2,500
3
450
225
3,000
3
400
225
3,500-4,000
4
350
210
4,500-5,000
5
300
180
5,500
6
300
180
6,000
6
250
150
6,500-7,000
7
250
150
7,500 or more
8 or more`
200
120
For SL• Ifoot= 304E ram, l galionper m)nole=3.785 Um.
a. Reduce by 100 feelfor dead-end streets or roads.
b. Where streets am provided with credit®r dividers which can be crossed by 5refigherspuning homilies, or whom onerial threats are provided with four mmore
haffic lanes and have atrafc countofmorethan 30,000 vehicles per day, hydrant spacing shall average500feet on each side of the street earths arranged on"
alternating basis up to a fire -flow requirement of 7,000 gallons per minute and 400 feet for h)gherfuo-flow, requirements.
c. Where new water mains are extended along a sects where hydrants arenotneeded i s protecnon ofstrucaves or sbabufueproblema, &e hydrants shall be pro-
vided at spacing not to exceed 1,000 feet to provide for Imospodndon hersrdo
d. Reduce by 50 feet for dead-end sheets or roads.
e. One hydrant for each 1,000 gallons per minute or fraction thereof.
2006 INTERNATIONAL FIRE CODE® 395