HomeMy WebLinkAboutFire Flow ReportApril 20, 2011
Ms, Erika Bridges
Planning and Development Services
City of College Station
1101 Texas Avenue
College Station, Texas 77842
Re: Fire Flow Report
Pi Beta Phi Sorority House Renovations & Addition
1601 Munson Avenue
College Station, Texas
Gessner Engineering Job No.: 11-0077
Dear Ms. Bridges:
The fire flow test information was provided by the City of College Station to
Gessner Engineering in regards to the fire hydrants located at the southwest
corner of Munson and University Oaks Blvd (Hydrant D-064) and at the northeast
corner of the Pi Beta Phi lot on University Oaks Blvd, (Hydrant D-143). See
attached fire flow data sheets from College Station Utilities as well as a hydrant
location map. The fire flow information is as follows:
Hydrant D-064
Hydrant D-143
Static Pressure
90 psi
92 psi
Residual Pressure
88 psi
90 psi
Flow
1420 gpm
1380 gpm
According to the International Fire Code, the fire flow demand required
for the 17,324 square feet building at this site is 2,250 gallons per minute
(gpm) with flow duration of two (2) hours. This demand was determined
for a Type V-A building with 12,901-17,400 square feet of fire flow
calculation area. The existing building contains a sprinkler system and
the proposed building will have a sprinkler system built in. It is our
understanding structures including sprinkler systems allow for a 50%
reduction of required fire demand. This reduces the total fire demand to
1,125 gpm for the site. However, a minimum required fire flow of 1,500
gpm will be used for this site.
The standard formula given in AWWA M-17 (1989), shown below, was
utilized for converting test flow data to distribution capacity at the
minimum 20 psi residual pressure.
P _ P') os4
Qr _ QI
P, — P,
NAGessner Eng Dula I 1\11.0077 Pi Phi Sorority House\CMADOC\I 1.0077 Fire Plow Report.doe
0
Gessner
Engineering
2501 AshFotd DAw
suite 102
C:olleg<Siaiitin.7czas 77840
P.O. Box 10763, 77842
979.680.8840
Fax 979.680.8841
2204 S. Chappell Hill Sum
11,enhmn.' ex;n 77833
979.836,6855
hoc 979,836,6847
where, Q, = the flaw at residual pressure P, (gpm)
Qr = hydrant discharge during test (gpm)
P, = static pressure (psi)
P, = desired residual pressure (psi)
Pr = residual pressure dwing test (pst)
The flow available with a 20 psi residual pressure at the planned area of
development is calculated to be approximately 9,685 gallons per minute from the
hydrant test data provided for hydrant D-064. The flow available with a 20 psi
residual pressure at the planned area of development is calculated to be
approximately 9,556 gallons per minute from the hydrant test data provided for
hydrant D-143. Therefore, the proposed site should have adequate fire flow for
the proposed Pi Beta Phi Sorority House additions.
Please contact us if you have any questions or if we can be of further assistance.
Sincerely,
GESSNER ENGINEERING, F-7461
Melissa P. Thomas, P.E.
Gessner Engineering
College Station Utilities
Rellable, Affordable, Community Owned
Date test completed WednesdaV April 20, 2011
Time completed 10:00 A.M.
Test completed by Vincent Rodriquez
Location 1601 Munson
Nozzle size
2.5
Hydrant number
D-143
Pitot reading in PSI
68
Flow in G.P.M.
1380
ATIC
1601 Munson
number D-034
PSI 92
Residual PSI
Comments
oil ge StationUtilities
Reliable, Affordable, Commaanily Owned
Date test completed Wednesday April 20, 2011
Time completed 9:50 A.M.
Test completed by Justin Tamplin
comments Requested Flow