HomeMy WebLinkAboutFire Flow Analysis6D
Fire Flow Analysis Report
for
Cedar Creek Plaza
College Station, Texas
Rev. January,2012
Prepared Bv:
Schultz Engineering, LLC
TBPE Firm Registration No. 12327
2730 Longmire, Suite A
College Station, Texas 77845OF
.
979.764.3900 a,«N
-""uM- /- 2 7- /Z
F-12327
SCHULTZ ENG(NEERiNG, LLC.
General Information
Location: Cedar Creek Plaza is located on North Graham Road between Holleman
Drive South Road and Old Wellborn Road.
General Note: A 12" water line will connect to the existing 12" water line on the north
side of Rock Prairie Road West and run south and east through the
proposed developed area. The proposed water will also connect to the
existing 4" waterline along North Graham Road. 2" lines will be
extended to the buildings for water service. These lines will be private
lines.
Land Use: Commercial
Design Criteria/Analysis
Primary Water Supply: Existing 12" water line along the north side of Rock Prairie Road West.
Domestic Demand:
Fixture Units: 144
Max. Demand Flow: 54 gpm
1 " Water Meter
Fire Hydrant Flow: Buildings 1-3 are 3,600 sf and are proposed to be Type V-B construction
per the International Building Code. In accordance with Table B105.1 of
the International Fire Code, the minimum required fire hydrant flow is
1,500 gpm.
Buildings 4-7 are 8,000 sf and are proposed to be Type V-A construction
per the International Building Code. hi accordance with Table B 105.1 of
the International Fire Code, the minimum required fire hydrant flow is
1,500 gprr
Building 8 is 9,600 sf and is proposed to be Type V-A 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 1,750
gpm.
Existing System Pressure Tests:
Flow Hydrant: FH 3 in Phase 2 of the Barracks near the intersection of Sergeant & Lt. Avenue
Flowrate: 1,210
Static Hydrant. FH I on General Parkway
Static Pressure: 75 psi
Residual Pressure: 56 psi
Exhibits: Exhibit A— Water Layout
Exhibit B — Water Line & Building Layout
Exhibit C — Water Layout — Existing and Proposed Waterlines
Appendix A — Normal Flow Calculations
Appendix B — Pipe & Junction Analysis — Domestic Flow
Appendix C — Pipe & Junction Analysis — Fire Flow & Domestic Demand
Appendix D — Pipe & Junction Analysis — Existing Waterlines — Fire Flow &
Domestic Demand
Water System Analysis:
WaterCad was used to model the proposed water system. The model
was run using the domestic flow only as well as the domestic flow and
required fire flow at each of the 4 proposed hydrants. Although the
fixture count method shows a peak demand of 54 gpm, 75 gpm was used
for this analysis. The diagram of the system is shown on Exhibit A and
the results for each scenario are included in Appendices B & C. The
lowest residual pressure in the system with the peak domestic flow of 75
gpm is 67.4 psi. The lowest residual pressure in the system for all of the
fire flow scenarios occurred with a fire flow of 1,500 gpm located at
FH4. This pressure was 25.3 psi. Both of these minimum pressures
exceed the required 35 psi for domestic flow and 20 psi for fire flow. The
maximum velocity in the system is 9.57 fps in 8" pipe no. 5.
Another analysis was done to include the existing 4" and 12"
waterlines in the area. The results from this analysis can be seen in
Appendix D. The model was run using the fire flow at proposed fire
hydrant 4 and the domestic demand for the system. The minimum
pressure in the system is 24.2 psi, which exceeds the required
minimum pressure of 20 psi. The maximum velocity in the system is
8.05 ft/s in pipes P4 & P-6. The maximum velocity in the existing 4"
waterline is 3.16 ft/s.
Conclusion
The proposed water lines and fire hydrants provide the required fire flow. The proposed 12" and
8" water lines meet or exceed all of the design criteria for the City of College Station. They will
provide adequate water pressure, flowrate and velocity for domestic demands and fire flow.
Appendix A
Normal Flow Calculations
Fixture Count Determination
Cedar Creek Plaza
Fixture Unit Value
Fixture Type # of Fixtures Load Factor Fixture Units
Bathroom Grou
Kitcken Sink
_01
9
6
1
0
f 9
Lavatory
18
2
36
Urinal (valve
0
5
0
Water Closet valve
0
10
_
0
Water Closet (tank)
18
4
72
Washer
0
4
0
Service Sink
91
3
27
Drinking Fountain
01
—
0.25
0
Total = 144
Demand -54gpm
WaterCAD Analysis Summary
Pipe Analysis - Domestic Flow
Pipe
Pipe
Hazen -
William C-
Pipe Flow
Velocity
Number
Length (ft)
Size (in)
Material
Value
(GPM)
(ft/s)
P-4
267
8
PVC
150
0
0
P-6
291
8
PVC
150
0
0
P-7
36
8
PVC
150
0
0
P-1
835
12
PVC
150
75
0.21
P-2
240
12
PVC
150
75
0.21
P-5
35
8
12
PVC
VC
PVC[
150
-
150
0
75
0
0.21
P-15
11
Appendix B
WaterCAD Analysis Summary
Junction Analysis - Domestic Flow
Junction
Demand
(GPM)
Pressure
(PSI)
J-1
0
69.7
J 3
_._ 75
68.8—
J-4
0
67.9
FH 4
0
0
67.4
68.1
J-5
FH 1
FH 3
FH 2
0
0
0
69
67.9
68.8
Appendix C
WaterCAD Analysis Summary
Pipe Analysis - Fire Flow & Domestic Demand - Fire Hydrant 1
Pipe
Number
Length (ft)
Size (in)
Pipe
Material
Hazen- I
William C-'Pipe Flow
Value (GPM)
I Velocity
NO
P-4
267
8
PVC
150
0
0
P-6
291
8
PVC
150
0
0
P-7
36
8
PVC
150
0
0
P-1
835
12
PVC
150
1,825
5.18
P-2
240
12
PVC
150
75
0.21
P-5
35
8
PVC
150
0
0
P-15
11
12
PVC
150
-1,825
5.18
Appendix C
WaterCAD Analysis Summary
Junction Analysis - Fire Flow & Domestic Demand - FH 2
Junction
Demand
(GPM)
Pressure
(PSI)
J-1
0
36.7
J-3 —
75
33.8
J-4
0
33
FH 4
0
32.4
J-5
0
33.1
FH 1
1750
34
FH 3
0
0
33
33.8
FH 2
Appendix C
WaterCAD Analysis Summary
Pine Analvsis - Fire Flow & Domestic Demand - Fire Hydrant 2
Pipe
Number
length (ft) I
Size (in) II'
Pipe
Material
Hazen -
William C-
Value
Pipe Flow
j (GPM)
Velocity
NO
P-4
267
8
PVC
150
0
0
P-6
291
8
PVC
150
0
0
P-7
36
8
PVC
150
0
0
P-1
835
12
PVC
150
1,575
4.47
P-2
240
12
PVC
150
1,575
4.47
P-5
35
8
PVC
150
0
------
0
---------
P-15
11
--
12
PVC
150
-1,575
4.47
Appendix C
WaterCAD Analysis Summary
Junction Analysis - Fire Flow & Domestic Demand - FH 2
Junction
Demand
(GPM)
Pressure
(PSI)
J-1
0
36.8
J-3
75
33.9
-J_4 -
0
—33
FH 4
0
32.5
J-5
FH 1
0
0
33.1
34.5
FH 3
FH 2
0
1500
33
33.8
Appendix C
WaterCAD Analysis Summary
Pipe Analysis - Fire Flow& Domestic Demand - Fire Hydrant 3
Pipe
Number
Length (ft)I
Size (in)
Pipe
Material
Hazen -
William C-,
Value I
Pipe Flow
(GPM)
Velocity
(ft/s)
P-4
267
8
PVC
150
1,500
9.57
P-6
291
8
PVC
150
0
0
P-7
36
8
PVC
150
0
0
P-1
835
12
PVC
150
1,575
4.47
P-2
240
12
PVC
150
1,575
4.47
P-5
35
8
PVC
150
1500
9.57
P-15
11
12
PVC
150
-1,575
4.47
Appendix C
WaterCAD Analysis Summary
Junction Analysis - Fire Flow & Domestic Demand - FH 3
Demand
Pressure
Junction
(GPM)
(PSI)
J-1
0
36.8
1-3
75
33.9
-J4
0
29.6
FH 4
0
29.1
J-5
0
29.7
FH 1
0
34.5
FH 3
1500
29.1
FH 2
0
33.9
Appendix C
WaterCAD Analysis Summary
Pipe Analysis - Fire Flow & Domestic Demand - Fire Hydrant 4
Pipe
Number
'length (ft)1
Size (in)
Hazen -
Pipe William C-,
Material Value
Pipe Flow 1
(GPM)
Velocity
NO
P-4
267
8
PVC
150
1,500
9.57
P-6
291
8
PVC
150
1,500
9.57
P-7
36
8
PVC
150
0
0
P-1
835
12
PVC
150
1,575
4.47
P-2
240
12
PVC
150
1,575
4.47
P-5
35
11
8
12
PVC
150
t
0
-1,575
0
4.47
P-15
PVC
150
Appendix C
WaterCAD Analysis Summary
Junction Analysis - Fire Flow & Domestic Demand - FH 4
Junction
Demand
(GPM)
Pressure
(PSI)
J-1
0
36.8
J-3
J-4
75
0
33.9
29.6_
_
FH 4
1,500
25.3
0
26
FH 1
0
34.5
FH 3
0
0
29.6
1 33.9
FH 2
Appendix D
WaterCAD Analysis Summary - Existing 4" Waterline
Pipe Analysis - Fire Flow & Domestic Demand- Fire Hydrant 4
Hazen -
Pipe
Length
Pipe
William C-1
Pipe Flow
Velocity
Number
(ft)
Size (in)
Material i I
Value
(GPM)
(ft/s)
P-4
267
8
PVC
150
1,261
8.05
P-6
291
8
PVC
150
1,261
8.05
P-7
36
8
PVC
150
-239
1.53
P 1
835
12
PVC
150
1,336
3.79
1,336
0
3.79
0
P-2
240
35
12
PVC
PVC
150
150
P-5
8
P-8
572
1233
4
4
PVC
PVC
150
150
-124
-124
3.16
3.16
P-9
P-10
1111
12
PVC
150
424
0.35
-1460
4.14
P-11
919
12
PVC
150
12
PVC
150
-1,460
4.14
P-12
1498
P-13
1186
12
PVC
150
-1,460
4.14
P-14
1591
12
PVC
150
-1460
4.14
P-15
1571
4
PVC
150
115
2.95
P-16
1801
4
PVC
150
115
2.95
P-17
1400
4
PVC
150
115
2.95
P-RES
17
12
PVC
150
1,575
4.47
Appendix D
WaterCAD Analysis Summary - Existing 4" Waterline
Junction Ana
lysis - Fire Flow & Domestic DE
Demand
Pressure
Junction
(GPM)
(PSI)
1-1
0
34.6
32.3
J-3
75
J-4
0
29
1500
25.7
_FH_4
J-5
0
26.4
FH 1
0
32.8
FH 3
0
29
FH 2
0
32.3
J-6
0
24.2
J-7
0
29.7
J-8
0
32.1
J-9
0
35.9
J-10
0
42.7
J-11
0
49.7
1-12
0
44.6
J-13
0
35.3
tmand -FH 4
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