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ALTON <br />W - <br />ENGINEERING, INC. <br />FLAME LIQUORS - 1301 KETTLEMAN LANE, LODI, CA 95242 01/20/98 11:19 <br />TANK HOLDDOWN/BUOYANCY CALCULATION - 20,000 GAL. <FLAME-2.WK1> <br />THIS CALCULATION IS FOR TRUSCO TANKS, AS DESCRIBED BELOW: <br />CAPACITY 20000 GALLONS WEIGHT 17680 LBS. <br />DIAMETER 10.78 FEET SUMPS 2 <br />LENGTH 30.05 FEET <br />TANK SLAB THICKNESS 0.67 FT. <br />BURY DEPTH (TOP OF SLAB) 5.00 FT. <br />ASSUME TANK AND BACKFILL COMPLETELY SUBMERGED, TO BOTTOM OF SLAB: <br />SUBMERGED WGT OF BACKFILL : 60.00 LBS/C.F, (PCF) <br />UNSUBMERGED WGT OF CONCRETE 150.00 PCF <br />WATER = 7.48 GALS./C,F. <br />WATER : 62.40 PCF <br />1. OVERBURDEN ABOVE THE TANK CAN BE CALCULATED USING THE FOLLOWING <br />FORMULA (PER PEI/RP 100-94): <br />((H/3)(B1 + B2 + SgRt B192)) - ((V/2) + M) <br />D : TANK DIAMETER <br />d : BURIAL DEPTH (to BOTTOM of SLAB) : 4,33 FT. <br />H : (D/2) + d : 9,72 FT, <br />L = TANK LENGTH <br />B1 : SLAB AREA : (L+4)*(D+3) = 469.25 SQ.FT. <br />B2 : REFLECTED TANK AREA (DSL) : 323.98 SQ,FT. <br />V : TANK DISPLACEMENT = Pi*rr*L = 2743.30 C.F. <br />M : VOIDS IN OVERBURDEN : 42" DIAM. SUMPS : 2 SUMP <br />: Pi*(3.5'/2)(3.5'/2) x 4.33 FT. * # : 83.38 C.F. <br />THEREFORE OVERBURDEN ABOVE TANK WOULD BE EQUAL TO: <br />H/3 Bl+B2 SgRtB1*B2 (V/2)+M <br />3,24 793.23 389.91 1455.03 - 2379.88 C.F. <br />2379.88 C.F. a 60.00 PCF : 142793 LBS. <br />2. CONCRETE SLAB : B1 + SLAB THICKNESS * CONC. WGT.: 46925 LBS. <br />3. TANK WEIGHT (PER MANUFACTURER) : 17680 LBS. <br />4. TANK TOP ANCILLARY EQUIPMENT : 2250 LBS. <br />TOTAL UPLIFT FORCE (UF) : (V+M) : WATER.WGT.: 176385 LBS. <br />TOTAL RESISTANT FORCE (RF) : (ITEMS 1.-4.) : 209648 LBS. <br />EXCESS RESIST FORCE RF -UF : 33263 LBS, : 16.6 TONS <br />JAN 2 g 19 <br />RF MORE THAN UF, THEREFORE, HOLDDOWNS NOT REQUIRED AT 60 " MIN, BURY DEPTH. <br />SAFETY FACTORY = RF/UF : 1.19 (DOES NOT INCLUDE FRICTION FACTORS, <br />WHICH INCREASE MARGIN). <br />-o0o- <br />843 Riske Lane, West Sacramento, CA 95691 (916) 372-1888 - Fax 373-1172 <br />Mailing Address: P.O. Box 1025, West Sacramento, CA 95691 <br />