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UG TANK BUOYANCY/RMTRAINT CALCULATIONS Date: 06/25/02 <br /> Proj: TRACY CHEVRON <br /> PN: 22915.00 <br /> 20.000 GALLON TANK <br /> DESIGN PARAMETERS: <br /> Tank Size: 20,000 gal. (TS) <br /> Tank Length: 38.00 ft. (L) <br /> Tank Diameter: 10.00 ft. (D) <br /> Tank Dry Weight: 15.000 Ib. (DW) <br /> Depth of Cover Bu 5.00 ft. HC op ° \' <br /> P (Bury): ( ) cy �V, <br /> Quantity of Sumps: 4 ea. (N) <br /> Diameter of Largest Sump: 3.50 ft. (DS) Q CUS8o Z Z�3 <br /> Density of Backfill: 120 Ib./cu.ft. (RPG) t, F�(�31'U2 $ <br /> Density of Concrete: 150 Ib./cu.ft. (RC) 9T cryoP <br /> Soil Rupture Surface (h/v): 0.15 (SRS) \�OPC4 Fo <br /> Grade Slab Height: 0.50 ft. (GSH) <br /> Grade Slab Length: 42.00 ft. (GSL) <br /> Grade Slab Width: 13.00 ft. (GSW) <br /> Minimum Hold Down Factor: 1.20 (HD) <br /> Assum tip ons: <br /> Water surface at top of grade slab. <br /> One Adjacent tanks <br /> BUOYANCY FORCE (BE) <br /> BF= (VT + (N *VS)) * 0.0624 kips/cu.ft. <br /> Volume of Tank (VT) <br /> VT= L * D'2 * pi/4 <br /> VT=38.00 * 10.00"2 * pi/4 = 2985 cu.ft. <br /> Volume of Sumps (VS) <br /> VS = HC * DS-2 * pi/4 <br /> VS = 5.00 * 3.50-2 * pi/4 = 48 cu.ft. <br /> BF = (2985 +(4 * 48)) * 0.0624 kips/cu.ft. = 198 kips <br /> HOLD DOWN FORCE (HDF)- CASE 1 - NO ANCHOR <br /> HDF= DW/ 1,000 Ib/kip +WGS +WPG <br /> Weight of Grade Slab (WGS) <br /> WGS=VGS * (RC-62.4 Ib/cu.ft.) / 1000 Ib./kip <br /> Volume of Grade Slab (VGS) <br /> VGS = (GSH *GSW * GSL) - (VS * GSH/HC * N) <br />