COMPLIANCE INFO_2003-2005 - Laserfiche WebLink

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WALTON ENGINEERING, INC. QUIK STOP 121 - 1196 W. LOUISE, MANTECA, CA 95336 03/11/98 09:37 TANK HOLDDOWN/BUOYANCY CALCULATION - 12,000 GAL. <XERX-12K.WK1> THIS CALCULATION IS FOR XERXES TANKS, AS DESCRIBED BELOW: CAPACITY 11527 GALLONS WEIGHT 4650 LBS. DIAMETER 8.00 FEET SUMPS 2 LENGTH 37.04 FEET TANK SLAB THICKNESS 0.67 FT. BURY DEPTH (TOP OF SLAB) 4.00 FT, ASSUME TANK AND BACKFILL COMPLETELY SUBMERGED, TO BOTTOM OF SLAB: SUBMERGED WGT OF BACKFILL : 60.00 LBS/C.F. (PCF) UNSUBMERGED WGT OF CONC. = 150.00 PCF WATER = 7,48 GALS./C.F. WATER : 62.40 PCF 1. OVERBURDEN ABOVE THE TANK CAN BE CALCULATED USING THE FOLLOWING FORMULA (PER PEI/RP 100-94): ((H/3)(B1 + B2 + SgRt B1=B2)) - ((V/2) + M) D = TANK DIAMETER d : BURIAL DEPTH (to BOTTOM of SLAB) : 3.33 FT, H = (D/2) + d = 7,33 FT. L = TANK LENGTH B1 = SLAB AREA = (L+4)=(D+3) : 451.44 SQ.FT. B2 : REFLECTED TANK AREA (D=(L-D)+(D/2*D/2*Pi) = 282.59 SQ.FT. V = TANK DSPLMNT. = Pi((rr*L-2r)+(4/3=rrr)) = 1727.79 C.F. M = VOIDS IN OVERBURDEN : 48" DIAM. SUMPS = 2 SUMP = Pi=(4.0'/2)(4.0'/2) 3.33 FT, t # = 83.78 C.F. THEREFORE OVERBURDEN ABOVE TANK WOULD BE EQUAL TO: H/3 B1+B2 SgRtBl*B2 (V/2)+M 2.44 734.03 357.17 947,67 = 1719.69 C.F. 1719.69 C.F. t 60.00 PCF : 103182 LBS. 2. CONCRETE SLAB = B1 a SLAB THICKNESS s CONC. WGT. = 45144 LBS. 3. TANK WEIGHT (PER MANUFACTURER) = 4650 LBS. 4. TANK TOP ANCILLARY EQUIPMENT : 1250 LBS. TOTAL UPLIFT FORCE (UF) = (V+M) $ WATER.WGT.= 113042 LBS. TOTAL RESISTANT FORCE (RF) _ (ITEMS 1.-4.) = 154226 LBS. EXCESS RESIST FORCE RF -UF : 41184 LBS.: 20.6 TONS RF MORE THAN UF, THEREFORE, BOLDDOWNS NOT REQUIRED AT 48 " MIN, BURY DEPTH. SAFETY FACTORY : RF/UF : 1.36 (DOES NOT INCLUDE FRICTION FACTORS, NOR REDUCTION FOR WET INTERSTITIAL SPACE, WHICH INCREASE MARGIN). -o00- 843 Riske Lane, West Sacramento, CA 95691 (916) 372-1888 - Fax 373-1172 Moilina Address: DO Box 1025, West Sacramento, CA 95691