HomeMy WebLinkAboutFire Flow AnalysisWater Design
Fire Flow Analysis Report
for
TDI-Brooks International Center
Office Building
College Station, Texas
January, 2012
Prepared By
Schultz Engineering, LLC
TBPE Firm Registration No. 12327
2730 Longmire, Suite A
College Station, Texas 77845 � o
979.764.3900
, FC9,i '2
F-12327
SCHULTZ ENGINEERING, LLC.
General Information
Location: TDI-Brooks International Center is located on the northeast side of the
intersection of South Dowling Road and I &GN Road.
General Note: A 12" water line was constructed that connected to the existing 12" water
line on the southwest side of the property, it runs east and then north to
the proposed developed area. 2" & 6" lines will be extended to the
building for water service and the fire sprinkler system. These lines will
be private lines. The layout of the water system is shown on Exhibit A.
Exhibit B is a hydrant flow test on the recently constructed 12" water
line. This test shows the system is capable of producing 3,000 gpm.
Land Use: Commercial/Office
Design Criteria/Analysis
Primary Water Supply: Existing 12" water line along the southeast side of the property.
Domestic Demand:
Max. Demand Flow: 52 gpm
2" Water Meter — Note: The water meter size is based on the laboratory and office building
being on the same meter.
Fire Flow: Proposed structure is 9,583 sf commercial office building and is proposed to be
Type III-B construction per the International Building Code. In accordance with
Table B 105.1 of the International Fire Code, the minimum required fire hydrant
flow is 2,250 gpm. The building will have a fire sprinkler system, therefore, the
hydrant flow is reduced to 1,500 gpm.
Flow Hydrant: Proposed FH2
Flowrate 1,500 gpm
Exhibits: Exhibit A — Water Layout
Exhibit B — Hydrant Flow Test
Exhibit C — Pipe and Junction Analysis — Domestic Demand
Exhibit D — Pipe and Junction Analysis — Fire Flow Demand
Conclusion
The existing 12" water line is in accordance with the BCS Water Design
Guidelines. This report provides the results of the water system analysis
under the fire flow & domestic conditions for the commercial laboratory
building. The lowest residual pressure in the system with the fire flow
and domestic demands (1,552 gpm) is 35 psi. The lowest residual
pressure in the system with only the domestic demand (52 gpm) is 49 psi.
Each of these pressures exceeds the 20 psi and 35 psi minimum pressure
requirements. The maximum velocity in all pipes is less than 12 fps. The
maximum velocity in the 12" pipe will be 4.4 fps with a fire flow of
1,500 gpm. The proposed 2" water service to the building and the
proposed fire hydrant will provide adequate water pressure and flowrate
for both domestic and fire flow demands.
EXHIBIT A
Water Layout
uIIM
uunai
EXHIBIT B
Hydrant Flow Test
Exhibit B
SCHULTZ ENGINEERING, LLC
FIRM #4538
WATER SYSTEM FIRE HYDRANT FLOW TEST REPORT
Date: 1 /13/2011
Water System Owner: Wellborn SUD
Development Project:
Flow Test Location:
TDI-Brooks International Lab and Office
Nozzle size (in.): 2 1 /211
Pitot Reading (psi): 57
Flowrate (gpm): 1260
Pressure Gauge Location: _
Static Pressure (psi): 60
Residual Pressure (psi): 52
Lot 1 Block 1 TDI-Brooks International Center
FH 1
Discharge Coeff: (c) = 0.90
Flowrate Formula: Q=29.84cd'p1/2
c = discharge coeff.
d = orifice size (in)
P = pitot pressure (psi)
Computed Discharge at 20 psi Residual Pressure: QR = 3005 epm
Discharge Formula: QR = QF X (hr 0 ' 54 0.54 /h{ )
Note: The flow test and report were prepared in accordance with NFPA 291.
Report Prepared by: Ricky Flores
Joseph P. Schultz
Others Present: James Alexander
Britt Curless
EXHIBIT C
Pipe and Junction Analysis — Domestic Demand
Exhibit C
WaterCAD Analysis Summary
Pipe Analysis - Domestic Flow
Pipe
Number
Length (ft)
Size (in)
Material
Hazen-
Williams C
Flow
(gpm)
Velocity
(ft/s)
P-3
446
12
PVC
150
52
0.15
P-4
20
12
PVC
150
0
0
P-5
25
12
PVC
150
0
0
P-6
22
12
PVC
150
-52
0.15
P-7
764
12
PVC
150
52
0.15
Exhibit C
WaterCAD Analysis Summary
Junction Analysis - Domestic Flow
Junction
Elevation
(ft)
Total
Demand
(gpm)
Pressure
(psi)
J-1
307.06
0
61.4
PROPOSED FH1
333.26
0
50.1
1-4
335.32
52
49.2
PROPOSED FH2
335.25
0
49.2
J-6
335.16
0
49.2
Exhibit D
WaterCAD Analysis Summary
Pipe Analysis - Fire Flow for Commercial Building Use - 1,500 gpm @ FH 1
Pipe
Number
Length (ft)
Size (in)
Material
Hazen-
Williams C
Flow
(gpm)
Velocity
(ft/s)
P-3
446
12
PVC
150
52
0.15
P-4
20
12
PVC
150
0
0
P-5
25
12
PVC
150
0
0
P-6
22
12
PVC
150
-1,552
4.4
P-7
764
12
PVC
150
1,552
4.4
Exhibit D
WaterCAD Analysis Summary
Junction Analysis - Fire Flow for Commercial Building Use -1,500 gpm @ FH 1
Junction
Elevation
(ft)
Total
Demand
(gpm)
Pressure
(psi)
J-1
307.06
0
49.7
PROPOSED FH1
333.26
1,500
36.9
J-4
335.32
52
36
PROPOSED FH2
335.25
0
36
J-6
335.16
0
36.1
Exhibit D
WaterCAD Analysis Summary
Pipe Analysis - Fire Flow for Commercial Building Use -1,500 gpm @ FH 2
Pipe
Number
Length (ft)
Size (in)
Material
Hazen-
Williams C
Flow
(gpm)
Velocity
(ft/s)
P-3
446
12
PVC
150
1,552
4.4
P-4
20
12
PVC
150
1,500
4.26
P-5
25
12
PVC
150
0
0
P-6
22
12
PVC
150
-1,552
1 4.4
P-7
764
12
PVC
150
1,552
1 4.4
Exhibit D
WaterCAD Analysis Summary
Junction Analysis - Fire Flow for Commercial Building Use - 1,500 gpm @ FH 2
Junction
Elevation
(ft)
Total
Demand
(gpm)
Pressure
(psi)
J-1
307.06
0
49.7
PROPOSED FH1
333.26
0
36.9
J-4
335.32
52
35.2
PROPOSED FH2
335.25
1,500
35.2
J-6
335.16
1
135.2
Water Design
Fire Flow Analysis Report
for
TDI-Brooks International Center
Office Building
College Station, Texas
January, 2012
Prepared B
Schultz Engineering, LLC
TBPE Firm Registration No.12327
2730 Longmire, Suite A
College Station, Texas 77845 off!
979.764.3900 � �..."
F-12327
SCHULTZ ENGINEERING, LLC.
General Information
Location: TDI-Brooks International Center is located on the northeast side of the
intersection of South Dowling Road and I &GN Road.
General Note: A 12" water line was constructed that connected to the existing 12" water
line on the southwest side of the property, it runs east and then north to
the proposed developed area. 2" & 6" lines will be extended to the
building for water service and the fire sprinkler system. These lines will
be private lines. The layout of the water system is shown on Exhibit A.
Exhibit B is a hydrant flow test on the recently constructed 12" water
line. This test shows the system is capable of producing 3,000 gpm.
Land Use: Commercial/Office
Design Criteria/Analysis
Primary Water Supply: Existing 12" water line along the southeast side of the property.
Domestic Demand:
Max. Demand Flow: 52 gpm
2" Water Meter — Note: The water meter size is based on the laboratory and office building
being on the same meter.
Fire Flow: Proposed structure is 9,583 sf commercial office building and is proposed to be
Type III-B construction per the International Building Code. In accordance with
Table B 105.1 of the International Fire Code, the minimum required fire hydrant
flow is 2,250 gpm. The building will have a fire sprinkler system, therefore, the
hydrant flow is reduced to 1,500 gpm.
Flow Hydrant: Proposed 17112
Flowrate: 1,500 gpm
Exhibits: Exhibit A — Water Layout
Exhibit B — Hydrant Flow Test
Exhibit C — Pipe and Junction Analysis — Domestic Demand
Exhibit D — Pipe and Junction Analysis — Fire Flow Demand
Conclusion
The existing 12" water line is in accordance with the BCS Water Design
Guidelines. This report provides the results of the water system analysis
under the fire flow & domestic conditions for the commercial laboratory
building. The lowest residual pressure in the system with the fire flow
and domestic demands (1,552 gpm) is 35 psi. The lowest residual
pressure in the system with only the domestic demand (52 gpm) is 49 psi.
Each of these pressures exceeds the 20 psi and 35 psi minimum pressure
requirements. The maximum velocity in all pipes is less than 12 fps. The
maximum velocity in the 12" pipe will be 4.4 fps with a fire flow of
1,500 gpm. The proposed 2" water service to the building and the
proposed fire hydrant will provide adequate water pressure and flowrate
for both domestic and fire flow demands.
EXHIBIT A
Water Layout
EXHIBIT B
Hydrant F►ow Test
Date:
Water System Owner:
Development Project:
Flow Test Location:
Exhibit B
SCHULTZ ENGINEERING, LLC
FIRM #4538
WATER SYSTEM FIRE HYDRANT FLOW TEST REPORT
1 /13/2011
Wellborn SUD
TDI-Brooks International Lab and Office
Nozzle size (in.): 21 /2r,
Pitot Reading (psi): 57
Flowrate (gpm): 1 260
Pressure Gauge Location: _
Static Pressure (psi): 60
Residual Pressure (psi): 52
Lot 1 Block 1 TDI-Brooks International Center
FH 1
Discharge Coeff: (c) = 0.90
Flowrate Formula: Q=29.84cdzp1/2
c= discharge coeff.
d = orifice size (in)
P = pitot pressure (psi)
Computed Discharge at 20 psi Residual Pressure: QR = 3005 Rpm
5a
Discharge Formula: QR = Qp X (hr 0 ' /hfo.5a)
Note: The flow test and report were prepared in accordance with NFPA 291.
Report Prepared by: Ricky Flores
Joseph P. Schultz
Others Present: James Alexander
Britt Curless
EXHIBIT C
Pipe and Junction Analysis — Domestic Demand
Exhibit C
WaterCAD Analysis Summary
Pipe Analysis - Domestic Flow
Pipe
Number
Length (ft)
Size (in)
Material
Hazen-
Williams C
Flow
(gpm)
Velocity
(ft/s)
P-3
446
12
PVC
150
52
0.15
P-4
20
12
PVC
150
0
0
P-5
25
12
PVC
150
0
0
P-6
22
12
PVC
150
-52
0.15
P-7
764
12
PVC
150
52
0.15
Exhibit C
WaterCAD Analysis Summary
Junction Analysis - Domestic Flow
Junction
Elevation
(ft)
Total
Demand
(gpm)
Pressure
(psi)
J-1
307.06
0
61.4
PROPOSED FH1
333.26
0
50.1
J-4
335.32
52
49.2
PROPOSED FH2
335.25
0
49.2
J-6
335.16
0
49.2
EXHIBIT D
Pipe and Junction Analysis — Fire Flow Demand
Exhibit D
WaterCAD Analysis Summary
Pipe Analysis - Fire Flow for Commercial Building Use - 1,500 gpm @ FH 2
Pipe
Number
Length (ft)
Size (in)
Material
Hazen-
Williams C
Flow
(gpm)
Velocity
(ft/s)
P-3
446
12
PVC
150
1,552
4.4
P-4
20
12
PVC
150
1,500
4.26
P-5
25
12
PVC
150
0
0
P-6
22
12
PVC
150
-1,552
4.4
P-7
764
12
PVC
150
1,552
4.4
Exhibit D
WaterCAD Analysis Summary
Junction Analysis - Fire Flow for Commercial Building Use -1,500 gpm @ FH 2
Junction
Elevation
(ft)
Total
Demand
(gpm)
Pressure
(psi)
J-1
307.06
0
49.7
PROPOSED FH1
333.26
0
36.9
J-4
335.32
52
35.2
PROPOSED FH2
335.25
1,500
35.2
J-6
335.16
0
35.2