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1 7"CONCRETE SLAB <br /> AT 87.6 LB/CF <br /> pry RECEATc, <br /> MAY 2 ? 3 <br /> ENVfPONh,LNTAL <br /> HEALTH OF04RTMENT <br /> BUOYANCY CALCULATIONS(20,000 GALLON TANK) 3'PC/,r <br /> CALCULATION BASED ON SUBMERGED WEIGHT OF MATERIALS: <br /> "XERXES"TANK WITH SPHERICAL ENDS. <br /> (10'NOMINAL) <br /> I o TANK LENGTH:37-91/4" <br /> 4'�IA j O TANK DIAMETER:10'-0" <br /> TRY 36'-0"DEADMAN,EACH SIDE,18"WIDE x 8"HIGH <br /> SUMPS m <br /> Z EMPTY TANK UPLIFT= 20.000 GAL =2,674 CU FT <br /> 7.48 GAL/CF <br /> 2,674 CU FT X 62.4 LBS/CF=166,845 LBS(DISPLACED WATER) <br /> I <br /> TANK SUMP UPLIFT=(2)X 3.14 X 2'2 X 4'=100.5 CU FT <br /> 100.5 CF X 62.4 LBS/CU FT=6,271 LBS(DISPLACED WATER) <br /> OO TOTAL TANK UPLIFT=166,845 LBS+6,271 LBS=173,116 LBS 1 <br /> I I <br /> I HOLD DOWN CALCULATION <br /> I I <br /> 1.TANK SLAB <br /> .58'X 14.0'X 42'=341 CU FT <br /> 341 CU FT X 87.6 LBS/CU FT=29,872 LBS j <br /> TANK 1 5, 2.CUBED BACKFILL ABOVE TANKS <br /> 1010 4'X 10.0'X 37.75'=1,510 CU FT-100.5 CU FT=1,409.5 CU FT <br /> 12,700# GRAVEL 1,409.5 CU FT X 57.6 LBS/CU FT=81.187 LBS j <br /> O6 COLUMN 3.CURVED BACKFILL ABOVE TANK <br /> O 3.14 X 5.0'2 X 37.75'=2,963.4 CU FT <br /> 10.0'X 10.0'X 37.75'=3,775.0 CU FT <br /> 3,775.0 CU FT-2,963.4 CU FT=811.6 CU FT=405.8 CU FT <br /> .87'x 1.5'x36' S I 2 <br /> DEADMAN 405.8 CU FT X 57.6 LBS/CU FT=23.374 LBS 1 QpDFES$/O�, <br /> 4.GRAVEL COLUMN ABOVE'X 2=1, ,1 S gfgRO <br /> 1.5'X 14.5'X 36.0'X 2=1,566 6 CU FT <br /> 1,566 CU FT X 57.6 LBS/CU FT=90,202 LBSj ro b <br /> 5.CONCRETE DEADMEN: w0 No.78916 P �n <br /> 0.67'X 1.5'X 36.0'=36.2 CU FT * e 03/18 ,k <br /> 36.2 CU FT X 87.6 LBS/CU FTX(2)=6,342 LBS j <br /> 6.DRY WEIGHT OF TANK: 12,700 LBS <br /> T <br /> TOTAL HOLD DOWN 243,677 LBS j F OF up", <br /> TOTAL HOLD DOWN: 243,677 LBS=1.41 SAFETY FACTOR <br /> TOTAL TANK UPLIFT:173,116 LBS <br />