Laserfiche WebLink
WALTON <br /> ENGINEERING, INC. <br /> QUIK STOP 125 - 1580 W. Main, Ripon, CA 95366 08/20/98 13:18 <br /> TANK HOLDDOWN/BUOYANCY CALCULATION - 10,000 GAL. <XQ125-10.WK1> <br /> THIS CALCULATION IS FOR XERXES TANKS, AS DESCRIBED BELOW: <br /> CAPACITY 9684 GALLONS WEIGHT 4085 LBS, <br /> DIAMETER 8.00 FEET SUMPS 2 <br /> LENGTH 31.54 FEET <br /> TANK SLAB THICKNESS (8") 0.67 FT. <br /> ASSUME BURY DEPTH (T.O.S.) 4,00 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 CONC. = 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)(Bl + B2 + SgRt BI#B2)) - ((V/2) + M) <br /> D = TANK DIAMETER <br /> d = BURIAL DEPTH (to BOTTOM of SLAB) = 3.33 FT. <br /> H = (D/2) + d : 7.33 FT. <br /> L = TANK LENGTH <br /> Bl = SLAB AREA : (L+4)*(D+3) = 390.94 SQ.FT. <br /> B2 = REFLECTED TANK AREA (D*(L-D)+(D/21D/2*Pi) = 238.59 SQ,FT, <br /> V = TANK DSPLMNT. : P1((rr$L-2r)+(4/3+rrr)) = 1451.33 C.F. <br /> M = VOIDS IN OVERBURDEN : 48" DIAM. SUMPS s 2 SUMP <br /> : P1x(4.0'/2)(4.0'/2) 3.33 FT. * # = 83.78 C.F. <br /> THEREFORE OVERBURDEN ABOVE TANK WOULD BE EQUAL TO: <br /> H/3 B1+B2 SgRtBl*B2 (V/2)+M <br /> 2.44 629.53 305.41 809.44 = 1475.95 C.F. <br /> 1475.95 C.F. x 60.00 PCF = 88557 LBS. <br /> 2. CONCRETE SLAB : B1 t SLAB THICKNESS # CONC, WGT. : 39094 LBS. <br /> 3. TANK WEIGHT (PER MANUFACTURER) = 4085 LBS. <br /> 4. TANK TOP ANCILLARY EQUIPMENT : 1250 LBS. <br /> TOTAL UPLIFT FORCE (OF) = (V+M) WATER.WGT.= 95791 LBS. <br /> TOTAL RESISTANT FORCE (RF) : (ITEMS L-4.) : 132986 LBS. An <br /> 5 <br /> EXCESS RESIST FORCE RF-UF = 37195 LBS. : 18.6 TONS <br /> n� <br /> RF MORE THAN UF, THEREFORE, HOLDDOWNS NOT REQUIRED AT 48 " MIN. BURY DEPTH, <br /> O, C 4 <br /> SAFETY FACTORY = RF/UF = 1.39 (DOES NOT INCLUDE FRICTION FACTORS, y REN•3.31-99 <br /> WHICH INCREASE MARGIN). '0c� p4` <br /> - o 0 o - 6(u(�8 <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 />