Laserfiche WebLink
UG TANK BUOYANCY/RE'STRAINT CALCULATIONS Date: 06/25/02 <br /> Proj: TRACY CHEVRON <br /> PN: 22915.00 <br /> (2) 20,000 GALLON TANK <br /> DESIGN PARAMETERS <br /> h = HC + D <br /> h = 5.00 + 10.00 = 15.00ft. <br /> a= h * SRS <br /> a= 15.00 * 0.15 = 2.25 ft. <br /> End area of backfill (A) <br /> A= (D + a) * h <br /> A= (10.00 + 2.25) * 15.00 = 184 sq.ft. <br /> AS = (D + (2 * a)) * (L + (2 * a)) <br /> AS = (10.00 + (2 * 2.25)) * (38.00 + 2 * ( 2.25)) = 616 sq.ft. <br /> VPG = (184 * 38.00) - (2985 +(4 * 48) + 254) = 3552 cu.ft. <br /> WPG = (3552 * (120-62.4) / 1,000 = 205 kips <br /> WDM = (CDQ * CDH * CDL * CDW) * (RC- 62.4 Ib./cu.ft.) / 1,000 Ib./kip <br /> WDM = (2 * 1.00 * 38.00 *1.00) * (150 - 62.4)) / 1 ,000 = 6.66 kips <br /> HDF= 15 + 22 + 205 + 7 = 248 kips <br /> HOLD DOWN FACTOR (HD) - CASE 2 <br /> HD = HDF/ BF <br /> HD = (248/ 198 ) = 1.25 <br /> 125 > 1.20 — Hold down force is sufficient. <br />