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UNDEr.GROUND TANK INSTALLATION Page 3 <br /> Design for Anchorage Against Buoyancy ZWitgn Guide <br /> STEP 6 -Determine Void 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 /> 242" 9.62 <br /> ® C 6Z cu. ft /ft. Sump Volume Factor 413" 12.57 <br /> lbs/sq ft Unit Weight of Cover (30) <br /> ® �_ �?3 y lbs SUMP DISPLACEMENT <br /> lbs. Sump Displacement (33) <br /> x + No. of Sumps (6) <br /> ® ' l'y 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) in. <br /> 121 in. Tank Diameter (4) Tank Length (5) ft. <br /> + 12.00 in. /ft Unit Weight of Cover (30) ?_r? ' lbs/sq ft of plan <br /> ® I0,7 ft. TANK DIAMETER <br /> ft Tank Diameter (35) <br /> x 'xr ' ft Tank Length (5) <br /> ® • 7 sq. ft TANK SHADOW AREA <br /> sq. ft. Tank Shadow Area (36) <br /> x -�' a' lbs/sq ft Unit Weight of Cover (30) <br /> Q lbs. GROSS BACKFILL WEIGHT <br /> lbs. Gross Backfill Weight (37) <br /> — 2(v734/1bs. Total Sump Displacement (34) <br /> ® Z lbs. HOLDDOWN PROVIDED BY INSTALLATION <br />