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UG TANK BUOYANCY/RE5I-RAINT CALCULATIONS Date: 06/25/02 <br /> Proj: TRACY CHEVRON <br /> PN: 22115001 <br /> (2) 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 (Bury): 5.00 ft. (HC) o ss/ y <br /> Quantity of Sumps: <br /> 4 ea. (N) <br /> Diameter of Largest Sump: 3.50 ft. (DS) �y z <br /> Density of Backfill: 120 Ib./cu.ft. (RPG) 0 c' No.054580 <br /> Density of Concrete: 150 Ib./cu.ft. (RC) �� k), a <br /> Soil Rupture Surface (h/v): 0.15 (SRS) sr�T CML oQ�3 <br /> FOFCA�F <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 /> Assumptions: <br /> Water surface at top of grade slab. <br /> BUOYANCY FORCE (BF) <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 />