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HomeMy WebLinkAboutFire Flow Study FIRE FLOW STUDY SITE PLAN BJ'S BREWHOUSE 1500 HARVEY ROAD (POST OAK MALL) COLLEGE STATION, TEXAS 77840 Job: 210216.003 ®o ®eoaoa e�P *E OF.TF *(r r o v *; W ;* FRANK G. HILL of 0 70154 a ..: 8 s . � V b it • y� qL ?O J : nuary, 2011 (Supercedes December 13, 2010) �techni f e:°° r ohute k Eng &Testing, Inc. leta sj�t�a�id • CONSULTING ENGINEERS 3200 E University Ave Georgetown, Texas 78626 512 - 930 -5832 FAX 5852 4603 Fringetree Woods San Antonio, Texas 78249 210 -241 -8060 210216003 Fire page 1 • OVERVIEW Kohutek Engineering & Testing, Inc. (KETI) was retained by Chicago Pizza Hospitality Holding, Inc. (BJ's Brewhouse) to create a Fire Flow model report that demonstrates adequate design for fire protection on the proposed 10249 SF building to be constructed at 1520 Harvey Road (Post Oak Mall), College Station, Texas 77845. TABS FIRE FLOW TEST RESULTS FIRE FLOW MODEL CITY OF COLLEGE STATION SITE DESIGN STANDARD FIRE SERVICE STANDARDS EXTRACT REFERENCES DATA We were provided a 28Jul10 fire flow test of new fire hydrant "E -187' which was performed for the Chuy's Restaurant currently under construction -200' to the north from this site. This hydrant is designated as EX FH1 in the model with an elevation of 286.00 (Assumed 4 VF below existing ground). Flow was 1300 GPM © 100 PSI static with 96 PSI residual at existing fire hydrant "D -174 ". Model node elevations are assumed finish ground - 4 VF for purposes of similar vertical comparison. The existing 12" water main along the perimeter road that will be the point of connection for this site is assumed to be PVC C900. ANALYSIS Refer to FIRE FLOW MODEL for node and pipe results for the proposed site fire protection. The proposed building 'Type' is V -B with a size of 10249 SF. With a 50% reduction for proposed sprinkler system the site flow requirement as per Table B105 -1 IFC 2009 is 1375 GPM @ 20 PSI. The model is set up to show this demand at the proposed onsite fire hydrant. The model reflects pressures at the demand point > 20 PSI. Modeling was done with Bentley WaterCAD 8Vi. Model uses 'water reservoir technique of establishing existing pressure - expressed in VF Head - at EX FH1. Using 2.31 PSI per VF, 100 PSI @ 2.31 PSI /1 VF = 231.00 VF Head. Adding this to the assumed pipe elevation for EX FH1 gives a starting HGL of 517.00 VF. A theoretical 5 LF 12" PVC pipe is used to 'connect' the water reservoir to the proposed 12 "x6" Tapping Sleeve and Valve connection to the existing 12" main to represent existing pressure at that point. The elevation for PR FH 1 was 290.00 (Assumed 3 VF above finished ground). PVC C900 150 PSI was chosen for the 6" fire main extension section. The fire flow model uses the technique of adding minor head losses to reflect the pipe fittings and appurtenances in lieu of actually showing small lengths of piping sections. Refer to the below table for a recap of each pipe segment P1 Tee - branch flow (1.25), Gate valve open (0.39), Contraction D2/D1 0.50 (0.37) - 2.01 P2 Tee - branch flow (1.25), Gate valve open (0.39) -1.64 FINDINGS The fire flow model shows 1375 GPM @ 88.5 PSI to the proposed Fire Hydrant I find that the proposed fire protection design is adequate and complies with the City of College Stations guidelines. • .'- rely submitted, -. G ' Gary) Hill, P.E. " roject Engineer 210216003 Fire Page 2 CITY OF COLLEGE STATION SITE DESIGN STANDARD FIRE SERVICE STANDARDS EXTRACT Fire Service Standards All fire service features, including, but not limited to, apparatus access roadways, fire flows, and fire hydrant locations and distribution must meet the International Fire Code, as adopted and amended. Fire Hydrants Fire hydrants must be placed along an approved fire lane. Hydrants shall be located so that no part of any structure, above ground tanks or fueling stations shall be more than three hundred feet (300') from a fire hydrant as measured along an approved fire lane as the fire hose is laid off the fire truck. In no case shall this distance be measured across grass, wooded or landscaped areas, over curbs, through fences, through ditches or across paved areas which are not designed and maintained as fire lanes. No part of any commercial structure shall be located outside the limits of a one hundred fifty foot (150') arc from a point where fire apparatus can operate. Fire hydrants must be located on the same side of a public street as the structures it is intended to serve, and must be accessible at all times. Parking stalls are not permitted to be located between the fire hydrant and the fire apparatus access road. A three foot (3') clear space is required on all sides of the fire hydrant. The number and spacing of fire hydrants shall not be less than shown in the following chart. NUMBER AND DIS7 RIBUTION oP ARE HYDRANTS AYERA0E SPACING WARM DISTANCE FROM FIRE -FLOW REOUIREIIE NT M/AMUkt AMBER BETWEEN NVDRANTSL °' ` ANY pow ON STREET OR Pato tow* OF HYDRANTS (Nasrh FRONTAGE TO A 14YDRANT 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 more 200 120 For SI: 1 foe = 304,8 mm. 1 gallon per minute = 3.785 Um 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 mentor mom than 30,000 vehicles per day, hydrant spacing shalt aver age500feetoneach side of the street andbe arrangedoo an al- ternating basis up to a fm -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 fee problems. fire hydrants shall be pro• vded at spacing not to exceed 1,000 feet to provide for transportation hazards. d. Reduce by 50 fed for dead -end sheds or roads. e. One hydrant for each 1.000 gallons per mince or fraction thereof. Fire Department Connection (FDC) All buildings, or portions of buildings, 12,000 square feet in area or larger, per the International Building Code, as amended, and /or all structures exceeding two stories in height, regardless of area, are required to utilize an automatic sprinkler system throughout the building. Portions of buildings that are separated by fire walls without openings, constructed in accordance with the International Building Code, may not require an automatic sprinkler system if smaller than 12,000 square feet in area. Some assembly uses intended for food and /or drink consumption including, but not -9- Fire Service Standards limited to banquet halls, night clubs, restaurants, taverns, and bars that exceed 5,000 square feet in area shall require an automatic sprinkler system. A Fire Department Connection (FDC) is required for all buildings utilizing an automatic sprinkler system. The FDC must be located within 150 feet of a fire hydrant. Fire Flow Requirements In general, the calculation area for fire flow requirements is based on the total gross area of the structure, including any area under the horizontal projections of the roof of the structure. Portions of the building that are separated by fire walls without openings and constructed in accordance with the International Building Code, may be considered as separate areas for the purposes of fire flow calculations. For type IA and type IB construction, the calculation shall be based on the area of the three largest successive floors. MMMMUM REQUIRED FIRE FLOW AND FLOW DURATION FOR BUILDINGS' FIRE -FLOW CALCULATION AREAsaquars UN) FIRE FLOW FLOW Type IA and IB' Type IIA and 111A' Type W and VA' Type 116 and MID' Type V41 (yaNan pot adnuter LION (um* 0-22, 700 0- 12,700 0- 8,200 0- 5,900 0 -3,600 1,500 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 2 38.701- 48300 21,801- 24,200 12,901 - 17,400 9,801 - 11600 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 83,701- 97,700 47,101- 54,900 30,101- 35,200 21,801- 25,900 13,401- 15,600 3.250 3 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 4,000 145,901 - 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 77,00143.700 47,401- 51,500 6,000 4 - - 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 121301 - 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 For SI: 1 square foot = 0A929 m 1 gallon per minute = 3.785 Lim, 1 pound per square inch = 6.895 kPa. a. The minimum 'envied fire flow shall be permitted to be reduced by 25 pacau to Group R. h Types of commix-lion are based oil the tnfenuuional 8nilding Code. c. Measured at 20 psi. -10- FIRE FLOW TEST RESULTS .11 (Of (coIIege station Utilities Reliable, Affordable, Community Owned Date Wednesday July 28, 2010 Time 3:00 P.M. Test completed by Vincent Rodriquez Witness Wyatt Jefferson Location Chuy's Nozzle size 2.5 Flow hydrant E -187 Pitot reading 60 G.P.M. 1300 Static hydrant D -174 Static PSI 100 Residual PSI 96 Comments FIRE FLOW MODEL Scenario: Base WATER SUPPLY EXFH1 TEE 4 END TEE 2 Al PRFH1 Bentley Systems, lnc. Haestad Methods Solution Bentley WaterCAD V8i (SELECTseries 1) 210216003.wtg Center [08.11.01.32] 1/1312011 27 Siemon Company Drive Suite 200 W Page 1 of 1 Watertown, CT 06795 USA +1- 203 - 755 -1666 FlexTable: Pipe Table (210216003.wtg) Current Time: 0.000 hours ID Label Length (Scaled) Start Node Stop Node Diameter (ft) (in) 33 El 20.30 WATER SUPPLY EX FH1 12 27 E2 120.69 EX FH1 TEE 1 12 35 E3 45.09 END TEE 1 12 45 P1 42.40 TEE 1 TEE 2 6 39 _ P2 19.33 PR FH 1 TEE 2 6 Material Hazen- Williams Has check Minor Loss Flow Velocity C Valve? Coefficient (gpm) (ft/s) (Local) PVC 150 False 0.000 1,375 3.90 PVC 150 False 0.000 1,375 3.90 PVC 150 False 0.000 0 0.00 PVC 150 False 2.010 1,375 15.60 PVC 150 False 1.640 -1,375 15.60 Headloss Has User Length (User Gradient Defined Length? Defined) (ft/ft) (ft) 0.004 True 5.00 0.004 True 175.00 0.000 True 10.00 0.213 True 69.00 0.722 True 10.00 Bentley Systems, Inc. Haestad Methods Solution Bentley WateCCAD V81(SELECTseries 1) 210216003.wtg Center 108.11.01.321 1/13/2011 27 Siemon Company Drive Suite 200 W Page 1 of 1 Watertown, CT 06795 USA +1- 203 -755 -1666 FlexTable: Junction Table (210216003.wtg) Current Time: 0.000 hours ID Label Elevation Zone Demand Demand (ft) Collection (91xm) <Collection: 0 25 EX FH1 286.00 <None> > 0 items lection: 26 TEE 1 286.00 <None> . <Col 0 0 items> <Collection: 0 28 TEE 2 283.00 <None > 0 items <Collection: 0 34 END 285.00 <None > 0 items Hydraulic Grade Pressure (ft) (Psl) 516.98 99.9 516.37 99.7 501.69 94.6 516.37 100.1 Bentley Systems, Inc. Haestad Methods Solution Bentley WaterCAD V& (SELECTseries 1) 210216003.wtg Center [08.11.0132) 1/13/2011 27 Siemon Company Drive Suite 200 W Page 1 of 1 Watertnvm, CT 06795 USA +1- 203- 755 -1666 FlexTable: Hydrant Table (210216003.wtg) Current lime: 0.000 hours ID Label Hydrant Status Indude Lateral Emitter Lateral Length Loss? Coefficient (ft) (9P 40 I PR FH 1 f Open I False 1 0.000 1 0.00 Elevation Zone Demand Demand Hydraulic Made Pressure (ft) Collection (gpm) (ft) (Psi) <Collection: 1 290.00 <None> 1,375 494.47 88.5 items> Bentley Systems, Inc. Haestad Methods Solution Bentley WateeiCAD V8i (SELECTseries 1) 210216003.wtg Center [08.11.01.32) 1/13/2011 27 Siemon Company Drive Suite 200 W Page 10t 1 Watertown, CT 06795 USA +1- 203 -755 -1666 FlexTable: Reservoir Table (210216003.wtg) Current Time: 0.000 hours ID Label Elevation Zone Flow (Out net) Hydraulic Grade (ft) (gpm) (ft) 321 WATER SUPPLY 1 517.00 1 <None> 1,375 1 517.00 I Bentley Systems, Inc. Haestad Methods Solution Bentley WaterCAD V81(SELECTsenes 1) 210218003.wtg Center 108.11.01.32] 1/13/2011 27 Siemon Company Drive Suite 200 W Page 1 011 Watertown, CT 06795 USA +1- 203 - 755 -1666 REFERENCES fitting Loss Coefficients Page 1 of 1 Fitting Loss Coefficients < ` I > For similar fittings, the K -value is highly dependent on things such as bend radius and contraction ratios. Typical Fitting K Coefficients Fitting K Value Fitting K Value Pipe Entrance 90° Smooth Bend Bellmouth 0.03-0.05 Bend Radius / D = 4 0.16 -0.18 Rounded 0.12 -0.25 Bend Radius / D = 2 0.19 -0.25 Sharp -Edged 0.50 Bend Radius / D = 1 0.35-0.40 Projecting 0.80 Mitered Bend Contraction- Sudden 0 = 15° 0.05 D = 0.80 0.18 0 = 30° 0.10 D = 0.50 0.37 8 = 45° 0.20 D = 0.20 0.49 0 = 60° 0.35 Contraction - Conical 0 = 90° 0.80 D = 0.80 0.05 Tee D = 0.50 0.07 Line Flow 0.30 -0.40 D = 0.20 0.08 Branch Flow 0.75 -1.80 Expansion- Sudden Cross 0 = 0.80 0.16 Line Flow 0.50 D = 0.50 0.57 Branch Flow 0.75 D = 0.20 0.92 45° Wye Expansion - Conical Line Flow 0.30 D = 0.80 0.03 Branch Flow 0.50 D = 0.50 0.08 D = 0.20 0.13 Copyright and Trademark Information mk:AMSITStore:C:\ Program %20Files\ Bentley \WaterCAD \WaterCAD.Chm::Bentley Wa... 1/13/2011 , *Koughness Values — Hazen - Williams Equation Page 1 of 1 Roughness Values—Hazen-Williams Equation { > Commonly used roughness values for different materials are: Hazen - Williams Roughness Coefficients (C) Pipe Material C Asbestos Cement 140 Brass 130 -140 Brick sewer 100 Cast -iron New, unlined 130 10 yr. Old 107 -113 20 yr. Old 89-100 30 yr. OId 75-90 40 yr. OId 64-83 Concrete or concrete lined Steel forms 140 Wooden forms 120 Centrifugally spun 135 Copper 130 -140 Galvanized iron 120 Glass 140 Lead 130 -140 Plastic 140 -150 Steel Coal -tar enamel, lined 145 -150 New unlined 140 -150 Riveted 110 Tin 130 Vitrified clay (good condition) 110 -140 Wood stave (average condition) 120 Copyright and Trademark Information mk: @MSITStore:C: \Program %20Files\ Bentley \WaterCAD \WaterCAD.chm::Bentley Wa... 1/13/2011