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UG TANK BIFOYANCY/RESTRAINT CALCULATIONS <br /> Proj: PACIFIC BELL FRENCH CAMP Date: 05/24/99 <br /> PN: 4747.00 <br /> (1) 2,000 GALLON TANK <br /> DESIGN PARAMETERS: <br /> h = HC + D <br /> h = 3.00 + 7.83 = 10.83 ft. <br /> a = h * SRS <br /> a = 10.83 * 0.25 = 2.71 ft. <br /> End area of backfill (A) <br /> A = (D + a) * h <br /> A = (7.83 + 2.71) * 10.83 = 114 sq.ft. <br /> AS = (D + (2 * a)) * (L + (2 * a)) <br /> AS = (7.83 + (2 * 2.71)) * (6.25 + 2 * ( 2.71)) = 155 sq.ft. <br /> VPG = (114 * 6.25) - (301 +(1 * 29) + 98) = 286 cu.ft. <br /> WPG = (286 * (120-62.4) / 1,000 = 16 kips <br /> WDM = (CDQ * CDH * CDL * CDW) * (RC - 62.4 Ib./cu.ft.) 11,000 Ib./kip <br /> WDM = (2 * 1.00 * 6.25 *1.00) * (150 - 62.4)) / 1,000 = 1.10 kips <br /> HDF = 4 + 9 + 16 + 1 = 31 kips <br /> HOLD DOWN FACTOR (HD) - CASE 2 <br /> HD = HDF / BF <br /> HD = (31 / 21 ) = 1.48 <br /> 1.48 > 1.20 Hold down fnrro ij Q sy <br /> Helmick and Lerner Inc <br />