HomeMy WebLinkAboutFire Flow Report r
October 19, 2010
Mr. Stephen Maldonado Jr.
City of College Station Water Services Department
1101 Texas Avenue
College Station, TX 77842
Re: Fire Flow Report
Proposed Hillel Student Center
800 George Bush Drive
College Station, Texas
Gessner Engineering Job No.: 10 -0407
Dear Mr, Maldonado:
The fire flow test information was provided by the City of College Station to
Gessner Engineering in regards to the fire hydrant located at 800 George Bush
Drive. The fire flow information is as follows:
800 Georg Bush
Static Pressure 82 psi
Residual Pressure 79 psi
Flow 1250 gpm
According to the International Fire Code, the fire flow demand at this site
is 2,750 gallons per minute with a flow duration of two (2) hours. This
demand was determined for a Type IIB building with 15,401- 18,400
square feet of fire flow calculation area. The total area of the proposed
student center is 16,768 square feet. The proposed building will have a
sprinkler system built in. It is our understanding structures including Gessner
sprinkler systems allow for a 50% reduction of required fire demand. Engineering
This reduces the total fire demand to 1,375 gallons per minute for the
site.
2501 Ashford Drive
The standard formula given in AWWA M -17 (1989), shown on the next Suite 102
page, was utilized for converting test flow data to distribution capacity at
the minimum 20 psi residual pressure. college station, Texas 77840
P.O. Box 10763, 77842
0.54
P s P r
Qr = Qt 979.680.8840
\. Ps —P t )
fax 979.680.8841
where, Q,-= fire flow at residual pressure P (gpm)
Q = hydrant discharge during test (gpm)
P = static pressure (psi) 2204 S. Chappell Hill Street
P = desired residual pressure (psi)
P = residual pressure during test (psi) Brenham, Texas 77833
979.836.6855
fax 979.836.6847
The flow available with a 20 psi residual pressure at 800 George Bush Drive
(planned area of development) is calculated to be approximately 6,400 gallons
per minute from the hydrant test data provided. Therefore, the proposed site
should have adequate fire flow for the proposed Hillel Student Center
development.
Fire suppression supply pipes were sized using the water distribution modeling
software, EPANET, developed by the EPA's Water Supply and Water Resources
Division. The modeled system head loss was computed using the Hazen -
Williams based hydraulic analysis.
Please contact us if you have any questions or if we can be of further assistance.
Sincerely,
GESSNER ENGINEERING, F -7451 % (_()
Melissa homas, P.E. y,.•' ' 4p I 1
4f_ MELISSA P. THOMAS
• 98 398 ' i
Kyle M. Zapalac, M.E., E.I.T ��I�o�,.�icEa ;
11 �s�`ON `L`
G Gessner Engineering