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Home My WebLink AboutWTC Bldg 4 & 7 - Hydraulic Analysis Letter Report 1 2 2 C I N E M A D R I V E, W I L M I N G T O N , N C 2 8 4 0 3 P H : ( 9 1 0 ) 7 9 1 - 6 7 0 7 F A X : ( 9 1 0 ) 7 9 1 - 6 7 6 0 January 15, 2025 Ray Griswold Fire Marshal, Deputy New Hanover County – Fire Rescue 230 Government Center Drive, Suite 130 Wilmington, NC 28403 RE: Wilmington Trade Center Buildings 4 & 7 Hydraulic Analysis of Required Fire Flow Dear Mr. Griswold: Along with representatives from Cape Fear Public Utility Authority and New Hanover County Fire Services, Odyssey Fire Protection conducted a hydrant flow test near the above referenced site. As shown on the attached exhibit map, the hydrant flow test was conducted at existing hydrants along US Highway 421 adjacent to the above referenced site. Based on the results hydrant flow test, Paramounte Engineering, Inc. (PEI) completed hydraulic analysis of required fire flow using WaterCAD software. Detailed results of this analysis are enclosed. As shown in the enclosed Required Fire Flow Calculation Per 2018 NCFSC Appendix B, the minimum fire flow required is 1,500 gpm. The enclosed results of the hydraulic analysis show this flow to be maintained throughout the proposed system. We appreciate the opportunity to provide this service for you and your project. Please feel free to contact me if you have any questions or require additional information. Sincerely, Paramounte Engineering, Inc. Jeremy R. Blair, PE Enclosure: as noted N O R T H CAROLIN A PR O FESSION ENGIN E E R SEAL A L J E R EMY R . B L A IR 0 2 8 8 5 2 1/15/24 1 2 2 C I N E M A D R I V E, W I L M I N G T O N , N C 2 8 4 0 3 P H : ( 9 1 0 ) 7 9 1 - 6 7 0 7 F A X : ( 9 1 0 ) 7 9 1 - 6 7 6 0 REQUIRED FIRE FLOW CALCULATION PER 2018 NCFSC APPENDIX B Project: Wilmington Trade Center Buildings 4 & 7 Location: 3930 N. US Highway 421, Wilmington, NC Fire Flow Calculation Area: 152,880 Sq. Ft. Construction Type: II-B Buildings will be outfitted with ESFR sprinkler system. Per Table B105.2, for a building of this type with an automatic sprinkler system, the Minimum Fire- Flow required will be 25% the value in Table B105.1(2). Flow Duration will be the value in Table B105.1(2) at the reduced flow rate. Based on the Fire Flow Calculation Area and Construction Type provided above, Table B105.1(2) indicates: Fire Flow = 4,250 gpm x 0.25 = 1,062.5 gpm (20 PSI) [NOTE: Reduced Fire Flow shall not be less than 1,500 gpm, so Fire Flow required is 1,500 gpm] Flow Duration = 4 hours at 1,500 gpm ODYSSEY FIRE PROTECTION Fire Flow Report Date Time 12/21/2023 9:15 Fire Flow @ 20psi Fire Flow @ 10psi Qr Flow in GPM Cd Friction loss Coefficient D diameter of opening in inches Pp Pressure on Pitot in psi Qf Fire flow in GPM at 20psi Static Pressure Residual Pressure Ps Static Pressure in psi Pr Residual Pressure in psi Hyd #Port #D Cd Pp Qr 1 4.5 0.89 0 0 2 2.5 0.9 46 1138 1 2.5 0.9 0 2 2.5 0.9 0 1 2.5 0.9 0 2 2.5 0.9 0 1138 Ray Griswold - De[puty F.M. & Jr. w/ CFPUA Total GPMs flowed in test 1 2 3 Person Conducting Test Jeff Tippett - OFP 68 61 Witness: Test Hydrant Information Location Hyd. #2719 & # 2928- HWY. 421 North 3,219 3,565 Legend 0 500 1000 1500 2000 2500 3000 3500 4000 10 20 30 40 50 60 70 80 90 100 GP M PSI Total Fire Flow 12/21/2023 1000 ft N ➤➤ N 16" Water Main Flow Hydrant: - Revised Location - New Fire Hydrant, recently added onto the16" Water Main - Fire Hydrant Tag #2928. Static/Residual Pressure Hydrant: - Fire Hydrant Tag #2719 Scenario: Fire Flow P- 8 P - 9 P-1 0 P-1 1 P -1 2 P -1 3 P -1 5 P -1 6 P - 1 7 P -1 8 P -1 4(1) P-1 4 (2 ) P - 1 9 P-20 WTC - Fireflow.wtg Bentley Systems, Inc. Haestad Methods Solution Center WaterCAD [24.00.00.26] 1/15/2025 76 Watertown Road, Suite 2D Thomaston, CT 06787 USA +1-203-755-1666 Page 1 of 1 You created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdf.com) Fire Flow Node FlexTable: Fire Flow Results Table Label Flow (Total Needed) (gpm) Flow (Total Available@20psi) (gpm) Pressure (Calculated Residual @ Total Flow Needed) (psi) J-7 1,500 3,118 55 J-8 1,500 3,023 53 J-9 1,500 2,871 53 J-10 1,500 2,757 52 J-11 1,500 2,743 52 J-12 1,500 2,641 51 J-13 1,500 2,641 51 J-14 1,500 2,210 44 J-15 1,500 1,886 36 J-16 1,500 1,564 23 J-17 1,500 2,666 51 J-19 1,500 1,923 38 J-20 1,500 1,891 37 J-21 1,500 1,648 27 WTC - Fireflow.wtg Bentley Systems, Inc. Haestad Methods Solution Center WaterCAD [24.00.00.26] 1/15/2025 76 Watertown Road, Suite 2D Thomaston, CT 06787 USA +1-203-755-1666 Page 1 of 1 FlexTable: Junction Table Label Elevation (ft) J-7 17.00 J-8 20.00 J-9 18.00 J-10 16.50 J-11 16.50 J-12 17.00 J-13 17.00 J-14 18.00 J-15 19.00 J-16 20.00 J-17 17.00 J-19 16.50 J-20 16.50 J-21 19.00 WTC - Fireflow.wtg Bentley Systems, Inc. Haestad Methods Solution Center WaterCAD [24.00.00.26] 1/15/2025 76 Watertown Road, Suite 2D Thomaston, CT 06787 USA +1-203-755-1666 Page 1 of 1 FlexTable: Pipe Table Label Length (ft) Diameter (in) Material Hazen-Williams C Has User Defined Length? P-8 1 99.0 PVC 130.0 True P-9 43 16.0 PVC 130.0 False P-10 299 12.0 PVC 130.0 False P-11 534 12.0 PVC 130.0 False P-12 454 12.0 PVC 130.0 False P-13 61 12.0 PVC 130.0 False P-14(1)345 12.0 PVC 130.0 False P-14(2)119 12.0 PVC 130.0 False P-15 90 12.0 PVC 130.0 False P-16 371 8.0 PVC 130.0 False P-17 453 8.0 PVC 130.0 False P-18 733 8.0 PVC 130.0 False P-19 848 8.0 PVC 130.0 False P-20 54 8.0 PVC 130.0 False P-21 517 8.0 PVC 130.0 False WTC - Fireflow.wtg Bentley Systems, Inc. Haestad Methods Solution Center WaterCAD [24.00.00.26] 1/15/2025 76 Watertown Road, Suite 2D Thomaston, CT 06787 USA +1-203-755-1666 Page 1 of 1 Pump Definition Detailed Report: Test Hydrant Element Details ID 49 Notes Label Test Hydrant Pump Curve Flow (gpm) Head (ft) 0 157.10 500 153.60 1,000 144.40 1,500 130.10 2,000 111.10 2,500 87.60 3,000 59.70 3,500 27.60 Pump Efficiency Type Pump Efficiency Type Best Efficiency Point Motor Efficiency 100.0 % BEP Efficiency 100.0 %Is Variable Speed Drive?False BEP Flow 0 gpm Transient (Physical) Inertia (Pump and Motor)0.000 lb·ft²Specific Speed SI=25, US=1280 Speed (Full)0 rpm Reverse Spin Allowed?True WTC - Fireflow.wtg Bentley Systems, Inc. Haestad Methods Solution Center WaterCAD [24.00.00.26] 1/15/2025 76 Watertown Road, Suite 2D Thomaston, CT 06787 USA +1-203-755-1666 Page 1 of 2 Pump Definition Detailed Report: Test Hydrant WTC - Fireflow.wtg Bentley Systems, Inc. Haestad Methods Solution Center WaterCAD [24.00.00.26] 1/15/2025 76 Watertown Road, Suite 2D Thomaston, CT 06787 USA +1-203-755-1666 Page 2 of 2