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UG TANK BUOYANCY/RESTTRAINT CALCULATIONS Date: 06/25/02 <br /> Proj: TRACY CHEVRON <br /> PN: 22915.00 <br /> (2) 20,00 GALLON TANK <br /> DESIGN PARAMETERS: <br /> VGS = (0.50 * 13.00 * 42.00) - (48 * 0.50/5.00 * 4) = 254 cu.ft. <br /> WGS = 254 * (150.00 - 62.4) / 1,000 = 22.23 kips <br /> Weight of Backfill (WPG) <br /> WPG =VPG * (RPG - 62.4 Ib./cu.ft.) 11 ,000 Ib/kip <br /> Volume of Backfill (VPG) <br /> VPG = (A * L) - ((VT/2) + (N * VS) + VGS) <br /> Height of backfill useable as down force (surface to midtank) (h) <br /> h = HC + (D/2) <br /> h = 5.00 + (10.00/2) = 10.00ft. <br /> Horizontal projection of backfill due to slope factor (a) (perp. to tank) <br /> a= h * SRS <br /> a= 10.00 * 0.15 = 1.50 ft. <br /> End area of backfill (A) <br /> A= (D + a) * h <br /> A= (10.00 + 1.50) * 10.00= 115 sq ft. <br /> VPG = (115 * 38) - ((2985/2) +(4 * 48) + 254) = 2432 cu.ft. <br /> WPG = (2432 * (120 - 62.4) / 1,000 = 140.06 kips <br /> HDF = 15 + 22 + 140 = 177 kips <br /> HOLD DOWN FACTOR (HD) - CASE 1 <br /> HD = HDF/ BF <br /> HD = HD = (177 / 198 ) = 0.89 <br /> 0-89 <= 1 .20 Provide additional anchorage See hold down Cas-e-2- <br /> HOLD <br /> ase2HOLD DOWN FORCE (HDE)7 CASE 2 - CONCRETE DEADMAN <br /> Concrete Deadmen Quantity: 2 ea. (CDQ) <br /> Concrete Deadmen Height: 1.00 ft. (CDH) <br /> Concrete Deadmen Length: 38.00 ft. (CDL) <br /> Concrete Deademen Width: (ea) 1.00 ft. (CDW) <br /> HDF = DW/1,000 Ib./kip + WGS + WPG + WDM <br /> WPG =VPG * (RPG - 62.4 Ib./cu.ft.) <br /> VPG = (A * L) - (VT + (N *VS) + VGS) <br /> Height of backfill useable for down load (surface to bottom of tank) (h) <br />