HomeMy WebLinkAboutFire Flow ReportCollege Station Fire Station #6
Water/Fire Flow Report
CALCULATED FLOWS
Flow at hydrant C-069 with 76 psi residual at C-07T
Q. = 29.83 ed D' Pp
Q, = 29.83 x 0.9 x (2.5)2v, 60
Q,=1,300. gpm
Flow at ht drant C-069 imiih 20d si residzal at C-077:
Qf = Q, x ((P. — 20)/(Ps — P,))O.S4
Qf =1,300 x ((80 — 20)/(80 — 76))"'
Qf= 5,611. gpm
Where:
Q,. = residual flow at pitotpressure (glint)
Qf = frre flow (gpm)
c,n = nozzle friction loss
D = nozzle opening diameter (inches)
Pe = pilot pressure (psi)
P,. = residual pressure (psi)
P,,. = static pressure (psi)
REOUIRED FLOWS
Building type — VB (Architectural plans)
Fire area = 25,133 sf (Architectural plans and Section B104 of 2009 IFC)
Required Fire Flow = 4,250 gpm (Table B105.1 of 2009IFQ
Nannber ofhydrazts required =5 (Table C105.1 of2009IFQ
RED UCTION IN REQUIRED FIRE FLOW FOR MINIMUMNUAIBER OF H1DRANT DETERAIINATIOAnAS
ALLOTTED PER LOCAL CODE FOR BUILDINGS WIT II APPROVED A UTOMA C SRPINKLER SI STF,AI
4,250 gpm x 50% reduction = 2,125 gpnn
Nzanber of hydrants required for• 50% reduction in required frre floww = 2 (Table C105.1 of 2009 IFC)
Note: IFC—International Fire Code
FINDINGS
5,611 gpm available at hydrant with 20 psi residual > 4,250 gpm required
(THEREFORE MEETS REQUIREMENTS)
I new hydrant at SE bldg. corner + I exist. hydrant at Tarrow/Peyton intersection = 2 hydrants > 2 hydrants required
(THEREFORE MEETS REQUIREMENTS)
Attachments — City of CS fire flow tests dated 3/7/11 (2 pp.); 2009 IFC, pp. 425-427; and scaled hydrant layout sketch
dif College Station Utilities
Reliable, Affordable, Community Owned
Date test completed Monday. March 07, 2011
Time completed 10:00 A.M.
Test completed by Vincent Rodriguez
Witness Justin Tamplin
Location
size
Hydrant number
Pitot reading in PSI
Flow in G.P.M.
jHydrant number
PSI
ual PSI
522 University Dr. E.
2.5
C-069
60
522 University Dr. E.
C-077
80
Comments Requested Flow
if
College Station Utilities
Rellable, Affordable, Community Owned
Date test completed Monday. March 07, 2011
Time completed 10:30 A.M.
Test completed by Justin Tamplin
Witness Vincent Rodriquez
FLOW HYDRANT
Location
600 Tarrow
Nozzle size
2.5
Hydrant number
C-022
Pitot reading in PSI
65
Flow in G.P.M.
1325
STATIC HYDRANT
Location 522 University Dr. E.
Hydrant number C-077
Static PSI 76
Residual PSI 74
Comments Requested Flow
The provisions contained in this appendix are not mandatory unless specifically referenced in the adopting ordinance.
SECTION 5101
GENERAL
6101.1 Scope. The procedure for determining fire -flow
requirements for buildings or portions of buildings hereafter
constructed shall be in accordance with this appendix. This
appendix does not apply to structures other than buildings.
SECTION B102
DEFINITIONS
8102.1 Definitions. For the purpose of this appendix, certain
terms are defined as follows:
FIRE -FLOW. The flow rate of a water supply, measured at 20
pounds per square inch (psi) (138 kPa) residual pressure, that is
available for fire fighting.
FIRE -FLOW CALCULATION AREA. The floor area, in
square feet (mr), used to determine the required fire flow.
SECTION B103
MODIFICATIONS
B103,1 Decreases, The fire chief is authorized to reduce the
fire -flow requirements for isolated buildings or a group of
buildings in rural areas or small communities where the devel-
opment of full fire -flow requirements is impractical.
B103.2 Increases. The fire chief is authorized to increase the
fire -flow requirements where conditions indicate an unusual
susceptibility to group fires or conflagrations. An increase
shall not be more than twice that required for the building under
consideration.
B103.3 Areas without water supply systems, For informa-
tion regarding water supplies for fire -fighting purposes in rural
and suburban areas in which adequate and reliable water sup-
ply systems do not exist, the fire code official is authorized to
utilize NFPA 1142 or the International Wildland-Urban Inter-
face Code.
SECTION 8104
FIRE -FLOW CALCULATION AREA
B104.1 General. The fire -flow calculation area shall be the
total floor area of all floor levels within the exterior walls, and
under the horizontal projections of the roof of a building,
except as modified in Section B 104.3,
B104.2 Area separation. Portions of buildings which are sep-
arated by fire walls without openings, constructed in accor-
dance with the International Building Code, are allowed to be
considered as separate fire -flow calculation areas.
B104.3 Type IA and Type IB construction. The fire -flaw cal-
culation area of buildings constructed of Type IA and Type IB
construction shall be the area of the three largest successive
floors.
Exception: Fire -flow calculation area for open parking
garages shall be determined by the area of the largest floor.
SECTION B105
FIRE -FLOW REQUIREMENTS FOR BUILDINGS
B105.1 One- and two-family dwellings. The minimum
fire -flow and flow duration requirements for one- and
two-family dwellings having a fire -flow calculation area that
does not exceed 3,600 square feet (344.5 m') shall be 1,000 gal-
lons per minute (3785.4 L/min) for 1 hour. Fire -Bow and flow
duration for dwellings having a fire -flow calculation area in
excess of 3,600 square feet (344.5m2) shall not be less than that
specified in Table B 105.1.
Exception: A reduction in required fire -flow of 50 percent,
as approved, is allowed when the building is equipped with
an approved automatic sprinkler system,
11105.2 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 B 105. I.
Exception: A reduction in required fire -flow of up to 75
percent, as approved, is allowed when the building is pro-
vided with an approved automatic sprinkler system
installed in accordance with Section 903.3, L t or 903.3,1.2.
The resulting fire -flaw shall not be less than 1,500 gallons
per minute (5678 L/min) for the prescribed duration as
specified in Table B 105.1.
SECTION 8106
REFERENCED STANDARDS
[CC IBG09 International Building Code B104.2,
Table B 105.1
ICC IWUIC-09 International Wildland- B103.3
Urban Interface Code
NFPA 1142-07 Standard on Water Supplies for B 103.3
Suburban and Rural Fire Fighting
2009 INTERNATIONAL FIRE COD& 425
APPENDIX B
TABLE B105.1
MINIMUM
REQUIRED FIRE
-FLOW AND FLOW
DURATION FOR BUILDINGS
FIRE -FLOW
CALCULATION AREA
(square toot)
Type IA and 100
Type IIA and IIIAa
Type IV and V-A'
Type IIB and IIIB"
Type V.S.
PRE -FLOW
(gallons per Wren
0-22,700
0.12,700
0.8,200
0-51900
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
15,40118400
9,401-11,300
2,750
70,901-83,700
39,701-47,100
25,501.30,100
18,401-21,800
11,301.13A00
3.000
93,701.97,700
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,OD1.20,600
3,750
128,701.145,900
72,401.82,100
46401-52,500
33,501.37,900
20,601-23,300
4,000
145,901.164,200
82.101.92,400
52501-59,100
37,901.42,700
23301-26,300
4,250
164,201-183,400
92,401.103,100
59101-66,ODO
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
29301-32,600
4,750
203701-225,200
114,601-126,70D
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
51500
2.71,201-295,900
152,601-166,500
97,701-106,500
70,601-77,000
43,401.47,400
5,750
295,901-Greater
166,501 Greeter
106,501.115,800
77,001.83,700
47,401-51,500
6,000
--
-
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
60201.64,800
6,750
-
-
145801-156,700
106,801-113,200
64801-69,600
7,000
-
-
156701167,900
113,201-121,300
6960174,600
7,250
-
-
167,901-179,400
121,301-129,600
74,601-79,800
7,500
-
179401191,400
129601-138,300
79,801.95.100
7,750
1
191,401-Oreater
138,301-Greater
85,101-Greater
8,000
minute = 3,785 Um,
I pound per square inch
= 6,895 kpa.
For 81: 1 square foot
=0.0929 m'-, I gallon per
a. Types of construction
ore based on the Inrernalional
Building Code.
b. Measured at 20 psi residual
pressure.
FLOW DURATION
(hours)
426 2009 INTERNATIONAL
2
3
4
The provisions contained in this appendix are not mandatory toeless specifically referenced in the adopting ordinance.
SECTION C101
GENERAL
C1011 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
002.1 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. The minimum number of fire
hydrants available to a building shall not be less than that listed
in Table C105.1. 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 perimeter public 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 are established to prevent obstruction
of such roads.
SECTION C'105
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 far 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, fire hydrants shall be
located such that all points on streets and access roads adjacent
to a building are within the distances listed in Table C105.1.
TABLE C105.1
NUMBER AND DISTRIBUTION
OF FIRE HYDF
AVERAGE SPACING
RE -FLOW REQUIREMENT
MINIMUM NUMBER
BETWEENHYDRANTS""
OF HYDRANTS
_ _ _ (hxq
1,750 or less '(
1 _
H 500 vH
2,000.2,250
�-
f 2_
_ _450
1
2,500
3
450
3,000
3
400
3 500 4,000
4
350
MAXIMUM DISTANCE FROM
250
225
225
225
210
4,500-5,000 5 300 ISO
5,500 6 300 180 j
6000 6 250 - ISO
6 500-7,000 _ 7 ,.. .... 250 150 .. ....
7,500 or more 8 or more 200 120
For Sb I foot = 304.8 mm, I gallon per minute = 3,785 Um.
a. Reduce by 100 feet for dead-end slicers or roads,
b. Where streets are provided with median dividers which cannot be crossed by fire fighters pulling hose lines, orwhere arterial streets are provided with four or more
traffic lanes and have a traffic count of more than 30,000 vehicles per day, hydrant spacing shall average 500 feet on each side of the street and be arranged on an
alternating basis up to a fire -Row requirement of 7,000 gallons per minute and 400 feet for higher fire -flow requirements.
c. Where new water mains are extended along streets where hydrants we not needed for protection of structures or similar fire in obtains, fire hydrants shall bepro-
vided at spacing not to exceed 1,000 feet to provide for transportation hazards.
d. Reduce by 50 feet for dead-end streets or roads.
e. One hydrant for each 1,000 gallons per minute, or fraction thereof.
2009 INTERNATIONAL FIRE CODE' 427
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