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Home My WebLink AboutFire FlowPipe Dia. (in.) Flow Rate (gpm) Velocity (fps) Pressure (psi)* 8 1,500 9.57 76 GATTISENGINEERINZj ENGINEERS 8 CONSULTANTS 2010 Moses Creek Ct., College Station, Texas 7784 • P: 979.575.5022 • F: 979.690.6888 Fire Flow Analysis Rock Prairie Professional Office Complex, Lot 1 January 2012 FIRE FLOW DESIGN The Fire Flow Analysis and Design for the above referenced project was developed in accordance with `Appendix B - Fire Flow Requirements for Buildings' and `Appendix C - Fire Hydrant Locations and Distribution' of the 2003 International Fire Code (Attachment #1). Please see Attachment #2 for project site plan and location of the existing fire hydrant(s). WATER LINE DATA (Attachment #3 - Flow Test) Location: Water Main Line Size Fire Flow Hydrant: Static Hydrant: Average Static Pressure Average Residual Pressure Tested Fire Flow (g.p.m.) PROJECT CONSTANTS Fire Area (s.f.) Type of Construction Require d Fire Flow (per IFC) Required Min. Residual Pressure # of Hydrants Required (per IFC) Distance to Fire Hydrant #! (Max. 250') Distance to Fire Hydrant #2 EXPECTED 12" WATER MAIN FLOW CALCULATIONS * Pressure Drop = -8 psi (NFPA 291) 1105 Rock Prairie (Private Drive) 8" Main N -098 N -109 84 psi 8/0 psi 1,375 GPM 5,495 s.f. Type III-B 1,500 gpm 20 psi 1 218' to furthest point. 322' to Closest point i ** :dwielz :* JOE I. GATTIS • ,.o: 9 .• � 90964 0 • `t � �` •• - E N S*• v\ SS`p • L NG PROJECT SUMMARY There will be one 5,495 square foot, one story building on Lot 1, being of Type III -B construction. There is an existing fire hydrant located at the corner of Rock Prairie Road and the existing private drive. The fire hydrant is currently within 218 feet of the existing fire hydrant and within the required 250 feet radius.. ATTACHMENT #1 `Appendix B - Fire Flow Requirements for Buildings' & `Appendix C - Fire Hydrant Locations and Distribution' of the 2003 International Fire Code FIRE -FLOW REQUIREMENTS FOR BUILDINGS The provisions contained in this appendix are not mandatory unless specifically referenced in the adopting ordinance. SECTION 8101 GENERAL B101.1 Scope. The procedure for determining fire -flow re- quirements for buildings or portions of buildings hereafter con- structed shall be in accordance with this appendix. This appendix does not apply to structures other than buildings. SECTION B102 DEFINITIONS 1 1 02.1 Definitions. For the purpose of this appendix, certain terms are defined as follows: FIRE FLOW. The flow rate of a water supply, measured at 20 pounds per square inch (psi) (138 kPa) residual pressure, that is available for fire fighting. 1 FIRE - FLOW CALCULATION AREA. The floor area, in square feet (m used to determine the required fire flow. SECTION B103 MODIFICATIONS B103.1 Decreases. The fire chief is authorized to reduce the fire -flow requirements for isolated buildings or a group of buildings in rural areas or small communities where the devel- opment of full fire -flow requirements is impractical. B103.2 Increases. The fire chief is authorized to increase the fire -flow requirements where conditions indicate an unusual susceptibility to group fires or conflagrations. An increase shall not be more than twice that required for the building under con- sideration. B103.3 Areas without water supply systems. For informa- tion regarding water supplies for fire - fighting purposes in rural and suburban areas in which adequate and reliable water supply systems do not exist, the fire code official is authorized to uti- lize NFPA 1142 or the International Urban Wildland Interface Code. SECTION B104 FIRE AREA 1 B104.1 General. The fire -flow calculation area shall be the to- tal floor area of all floor levels within the exterior walls, and un- der the horizontal projections of the roof of a building, except as modified in Section B104.3. B104.2 Area separation. Portions of buildings which are sepa- rated by fire walls without openings, constructed in accordance with the International Building Code, are allowed to be consid- ered as separate fire -flow calculation areas. APPENDIX B B104.3 Type IA and Type IB construction. The fire - flow cal 1 culation area of buildings constructed of Type IA and Type IB construction shall be the area of the three largest successive floors. Exception: Fire -flow calculation area for open parking ga- 1 rages shall be determined by the area of the largest floor. SECTION B105 FIRE -FLOW REQUIREMENTS FOR BUILDINGS B105.1 One and two - family dwellings. The minimum fire -flow requirements for one- and two- family dwellings hav- ing a fire -flow calculation area which does not exceed 3,600 square feet (344.5 m shall be 1,000 gallons per minute (3785.4 L /min). Fire flow and flow duration for dwellings hav- ing a fire -flow calculation area in excess of 3,600 square feet 1 (344.5 m shall not be less than that specified in Table B105.1. Exception: A reduction in required fire flow of 50 percent, as approved, is allowed when the building is provided with an approved automatic sprinkler system. B105.2 Buildings other than one and two family dwellings. The minimum fire flow and flow duration for buildings other than one- and two- family dwellings shall be as specified in Ta- ble B105.1. Exception: A reduction in required fire flow of up to 50 percent, as approved, is allowed when the building is pro- vided with an approved automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2 of the In- ternational Fire Code. Where buildings are also of Type I or II construction and are a light- hazard occupancy as defined by NFPA 13, the reduction may be up to 75 percent. The re- sulting fire flow shall not be less than 1,500 gallons per min- ute (5678 1 /min) for the prescribed duration as specified in Table B 105.1. ICC IUWIC SECTION B106 REFERENCED STANDARDS ICC IBC International Building Code ICC IFC International Fire Code International Urban - Wildland Interface Code Standard on Water Supplies NFPA 1142 for Suburban and Rural Fire Fighting B104.2, Table B105.1 B 105.2 B103.3 B103.3 2003 INTERNATIONAL FIRE CODE® 371 1 FIRE -FLOW CALCULATION AREA (square feet) FIRE FLOW (gallons per minute)` FLOW DURATION (hours) Type IA and IB Type IIA and IllA Type IV and V -A Type IIB and IIIB Type V -B 0- 22,700 0- 12,700 0 -8,200 0 -5,900 0 -3,600 1,500 2 22,701- 30,200 12,701- 17,000 8,201- 10,900 5,901 -7,900 3,601 -4,800 1,750 30,201- 38,700 17,001- 21,800 10,901- 12,900 7,901 -9,800 4,801 -6,200 2,000 38,701- 48,300 21,801- 24,200 12,901- 17,400 9,801- 12,600 6,201 -7,700 2,250 48,301 - 59,000 24,201- 33,200 17,401- 21,300 12,601- 15,400 7,701 -9,400 2,500 59,001- 70,900 33,201- 39,700 21,301- 25,500 15,401- 18,400 9,401- 11,300 2,750 70,901- 83,700 39,701- 47,100 25,501- 30,100 18,401- 21,800 11,301 - 13,400 3,000 3 83,701- 97,700 47,101 - 54,900 30,101- 35,200 21,801- 25,900 13,401 - 15,600 3,250 97,701- 112,700 54,901- 63,400 35,201- 40,600 25,901- 29,300 15,601- 18,000 3,500 112,701- 128,700 63,401- 72,400 40,601- 46,400 29,301- 33,500 18,001- 20,600 3,750 128,701- 145,900 72,401- 82,100 46,401- 52,500 33,501- 37,900 20,601- 23,300 4,000 4 145,901- 164,200 82,101- 92,400 52,501 - 59,100 37,901- 42,700 23,301- 26,300 4,250 164,201- 183,400 92,401 - 103,100 59,101- 66,000 42,701- 47,700 26,301- 29,300 4,500 183,401- 203,700 103,101- 114,600 66,001- 73,300 47,701 - 53,000 29,301- 32,600 4,750 203,701- 225,200 114,601 - 126,700 73,301- 81,100 53,001- 58,600 32,601- 36,000 5,000 225,201- 247,700 126,701 - 139,400 81,101- 89,200 58,601- 65,400 36,001- 39,600 5,250 247,701- 271,200 139,401- 152,600 89,201- 97,700 65,401- 70,600 39,601- 43,400 5,500 271,201- 295,900 152,601 - 166,500 97,701- 106,500 70,601- 77,000 43,401- 47,400 5,750 295,901- Greater 166,501- Greater 106,501 - 115,800 77,001- 83,700 47,401 - 51,500 6,000 - 115,801- 125,500 83,701- 90,600 51,501 - 55,700 6,250 - - 125,501- 135,500 90,601- 97,900 55,701- 60,200 6,500 - 135,501- 145,800 97,901- 106,800 60,201- 64,800 6,750 - - 145,801- 156,700 106,801- 113,200 64,801- 69,600 7,000 - - 156,701- 167,900 113,201 - 121,300 69,601- 74,600 7,250 - - 167,901- 179,400 121,301- 129,600 74,601- 79,800 7,500 - 179,401 - 191,400 129,601- 138,300 79,801- 85,100 7,750 191,401- Greater 138,301- Greater 85,101- Greater 8,000 FIRE -FLOW REQUIREMENTS FOR BUILDINGS For SI: 1 square foot = 0.0929 m 1 gallon per minute = 3.785 L /m, 1 pound per square inch = 6.895 kPa. 1 a. The minimum required fire flow shall be permitted to be reduced by 25 percent for Use Group R. b. Types of construction are based on the International Building Code. c. Measured at 20 psi. 372 TABLE B105.1 7W AND FLO DURATION FOR BUILDINGS 2003 INTERNATIONAL FIRE CODE® FIRE -FLOW REQUIREMENT (gpm) MINIMUM NUMBER OF HYDRANTS AVERAGE SPACING BETWEEN HYDRANTS b ' c (feet) MAXIMUM DISTANCE FROM ANY POINT ON STREET OR ROAD FRONTAGE TO A HYDRANT 1,750 or less 1 500 250 2,000 -2,250 2 450 225 2,500 3 450 225 3,000 3 400 225 3,500 -4,000 4 350 210 4,500 -5,000 5 300 180 5,500 6 300 180 6,000 6 250 150 6,500 -7,000 7 250 150 7,500 or more 8 or moree 200 120 FIRE HYDRANT LOCATIONS AND DISTRIBUTION The provisions contained in this appendix are not mandatory unless specifically referenced in the adopting ordinance. SECTION C101 GENERAL C101.1 Scope. Fire hydrants shall be provided in accordance with this appendix for the protection of buildings, or portions of buildings, hereafter constructed. SECTION C102 LOCATION C102.1 Fire hydrant locations. Fire hydrants shall be pro- vided along required fire apparatus access roads and adjacent public streets. SECTION C103 NUMBER OF FIRE HYDRANTS C103.1 Fire hydrants available. The minimum number of fire hydrants available to a building shall not be less than that listed in Table C105.1. The number of fire hydrants available to a complex or subdivision shall not be less than that determined by spacing requirements listed in Table C105.1 when applied to fire apparatus access roads and perimeter public streets from which fire operations could be conducted. APPENDIX C TABLE C105.1 FIRE HYDRANTS SECTION C104 CONSIDERATION OF EXISTING FIRE HYDRANTS C104.1 Existing fire hydrants. Existing fire hydrants on pub- lic streets are allowed to be considered as available. Existing fire hydrants on adjacent properties shall not be considered available unless fire apparatus access roads extend between properties and easements are established to prevent obstruction of such roads. SECTION C105 DISTRIBUTION OF FIRE HYDRANTS C105.1 Hydrant spacing. The average spacing between fire hydrants shall not exceed that listed in Table C105.1. Exception: The fire chief is authorized to accept a defi- ciency of up to 10 percent where existing fire hydrants pro- vide all or a portion of the required fire hydrant service. Regardless of the average spacing, fire hydrants shall be lo- cated such that all points on streets and access roads adjacent to a building are within the distances listed in Table C105.1. For SI: 1 foot = 304.8 mm, 1 gallon per minute = 3.785 L /m. a. Reduce by 100 feet for dead -end streets or roads. b. Where streets are provided with median dividers which can be crossed by fire fighters pulling hose lines, or where arterial streets are provided with four or more traffic lanes and have a traffic count of more than 30,000 vehicles per day, hydrant spacing shall average 500 feet on each side of the street and be arranged on an al- ternating basis up to a fire -flow requirement of 7,000 gallons per minute and 400 feet for higher fire -flow requirements. c. Where new water mains are extended along streets where hydrants are not needed for protection of structures or similar fire problems, fire hydrants shall be pro- vided at spacing not to exceed 1,000 feet to provide for transportation hazards. d. Reduce by 50 feet for dead -end streets or roads. e. One hydrant for each 1,000 gallons per minute or fraction thereof. 2003 INTERNATIONAL FIRE CODE® 373 ATTACHMENT #2 Project Site Layout (EXI5T)NG CONCRETE PRIVATE DRIVE) 379 m,:tra nzy,Lz, 5 43°45'45" 5. I Id I .20' (EXISTING CONCRETE PRIVATE DRIVE) 379 IJ 91 , #2 75 — 5$45 945 r: s a y qtha „q9ri IV 43'45'45 W 1 7 1.35' 320 .g90 <aa SNOISIAN 190 IN1.03 ■6(16) • 16844. 3 N1 0 3 • 19621 x 'ad 969(3(15 6(91(1 SINVITISNOD + SIMNIONH ON12:139NION3SI11VO 75' SIDE SETBACK UNE 8 17 :3911 ' — 1in — 19n N 43'4945" W 17 35' 320 LO AtiVnNVr SVX31 `1•1011V1S 3031100 1.01-# elS "PEI 91.11eld 31008 COI- I- X31dIA100 301AA0 1VNOISS3A0Eld 31E11ln:1d )10011 (DRIVEWAY) L 1`72 — 397 r?. 5 14 g. 5 43°45'45 E 1.20 zt.oz AavnNvr SVX31 `AINnoo sozvaa (sediessmon) SaN1010H1S3MH1110S .1. ..LOVN1 Pp 1. 101 dN a3NOZ - 1013NOV SZfal , 0 05 0 N'til d 3.LIS ar 0 IU > '881 UJ 0 g Co 0 0 M 0 0 4; JOE I. GATTIS PAr K. DETAIL IP 1 i il 1 II I illi II _ II : g 1 k 16 g 1 ii diki; (EXI5T)NG CONCRETE PRIVATE DRIVE) 379 m,:tra nzy,Lz, 5 43°45'45" 5. I Id I .20' (EXISTING CONCRETE PRIVATE DRIVE) 379 IJ 91 , #2 75 — 5$45 945 r: s a y qtha „q9ri IV 43'45'45 W 1 7 1.35' 320 .g90 <aa SNOISIAN 190 IN1.03 ■6(16) • 16844. 3 N1 0 3 • 19621 x 'ad 969(3(15 6(91(1 SINVITISNOD + SIMNIONH ON12:139NION3SI11VO 75' SIDE SETBACK UNE 8 17 :3911 ' — 1in — 19n N 43'4945" W 17 35' 320 LO AtiVnNVr SVX31 `1•1011V1S 3031100 1.01-# elS "PEI 91.11eld 31008 COI- I- X31dIA100 301AA0 1VNOISS3A0Eld 31E11ln:1d )10011 (DRIVEWAY) L 1`72 — 397 r?. 5 14 g. 5 43°45'45 E 1.20 zt.oz AavnNvr SVX31 `AINnoo sozvaa (sediessmon) SaN1010H1S3MH1110S .1. ..LOVN1 Pp 1. 101 dN a3NOZ - 1013NOV SZfal , 0 05 0 N'til d 3.LIS ar 0 IU > '881 UJ 0 g Co 0 0 M 0 0 4; JOE I. GATTIS PAr K. DETAIL ATTACHMENT D Sheet Fire Flow Test Date test completed Wednesda March 09 2011 Time completed 1:0 0 P P.M. Test completed by Justin Tamplin Witness Vincent Rodriguez Re (01 cttlege Station Utilities Reliable, Affordable, Community Owned FLOW HYDRANT Location 1105 Rock Prairie Nozzle size 2.5 Hydrant number N - 098 Pitot reading in PSI 67 Flow in G.P.M. 1375 STATIC HYDRANT Location 1103 Rock Prairie Hydrant number N - 109 Static PSI 84 Residual PSI 80 Comments � - nested Flow i 4 rt) Q CO tr8 - S ST Cr) b VIM 4320 3 C = . r„ es ch grA