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0 • <br /> UG TANK BUOYANCY/RESTRAINT CALCULATIONS Date: 05/24/99 <br /> Proj: PACIFIC BELL FRENCH CAMP <br /> PN: 4747.00 <br /> (1) 2,000 GALLON TANK <br /> DESIGN PARAMETERS: <br /> Tank Size: 2,000 gal. (TS) <br /> Tank Length: 6.25 ft. (L) <br /> Tank Diameter: 7.83 ft. (D) <br /> Tank Dry Weight: 4,400 Ib. (DW) <br /> Depth of Cover (Bury): 3.00 ft. (HC) ro <br /> Quantity of Sumps: 1 ea. (N) <br /> Diameter of Largest Sump: 3.50 ft. (DS) NIL CUM y m <br /> Density of Backfill: 120 Ib./cu.ft. (RPG) i <br /> Density of Concrete: 150 Ib./cu.ft. (RC) I�3(9Y <br /> �P <br /> Soil Rupture Surface (h/v): 0.25 (SRS) occ ,�Pa <br /> Grade Slab Height: 0.67 ft. (GSH) <br /> Grade Slab Length: 13.00 ft. (GSL) <br /> Grade Slab Width: 12.00 ft. (GSW) <br /> Minimum Hold Down Factor: 1.20 (HD) <br /> Assumptions: <br /> Water surface at top of grade slab. <br /> No Adjacent tanks <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 = 6.25 * 7.8312 * pi/4 = 301 cu.ft. <br /> Volume of Sumps (VS) <br /> VS = HC * DS^2 * pi/4 <br /> VS = 3.00 * 3.5012 * pi/4 = 29 cu.ft. <br /> BF = (301 +(1 * 29)) * 0.0624 kips/cu.ft. = 21 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 /> Helmick and Lerner Inc <br />