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UNDEkvROUND TANK INSTALLATION Page 3 <br /> Design for Anchorage Against Buoyancy Devign ode <br /> STEP 8 -Determine Vold Volume at Sump Locations Sump <br /> If no sump risers are used on the installation enter zero(0)on lines 33 and Volume <br /> 34 and proceed to Step 7. Otherwise, determine the amount of holddown Sump Diameter Factor <br /> force lost in the sump zones. From the chart at right locate the volume 24" 3.14 <br /> factor for the size of the sumps being used. 30" 4.91 <br /> 33" 5.94 <br /> 36" 7.07 <br /> rl'� Z�-cu. ft. /ft. Sump Volume Factor 48' �1T <br /> X Z-7•'7 lbs/sq ft Unit Weight of Cover (30) <br /> ® -2L7-1, lbs SUMP DISPLACEMENT <br /> lbs. Sump Displacement (33) <br /> x No. of Sums 6 <br /> lbs TOTAL SUMP DISPLACEMENT <br /> STEP 7 -Determine Total Holddown Provided by Installation <br /> Determine Gross Backfill Weight of the installation by multiplying the Unit <br /> Weight of Cover(30)by the tank dimensions. From this number subtract <br /> he Total Sump Displacement(34)to determine the Holddown Provided by <br /> Installation. <br /> Tank Outside Dia (4) 1-7 in. <br /> qin. Tank Diameter (4) Tank Length (5) z(,, 0?eft. <br /> + 12.00 in./ft Unit Weight of Cover (30) 277 lbs/sq ft of plan <br /> ® •n ft. TANK DIAMETER <br /> R Tank Diameter (35) <br /> x 7(o• 75 R Tank Length (5) <br /> ® Z S-,-7 sq. R TANK SHADOW AREA <br /> 7� 5-7 sq. ft. Tank Shadow Area (38) <br /> x 11-77,,9 lbs/sq ft Unit Weight of Cover (30) <br /> J17 / lbs. GROSS BACKFILL WEIGHT <br /> 9f9 lbs. Gross Backfill Weight (37) <br /> �ZG-7,4( lbs. Total Sump Displacement (34) <br /> ® �- Ibs. HOLDDOWN PROVIDED BY INSTALLATION <br />