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1 <br /> Buoyancy of Underground Tanks 4/14/2022 <br /> " Bold Typed Items are Input Values " <br /> Underground Tank Description : 20K GSII <br /> Tank Model : GSII <br /> Outer Tank Diameter (Inches) : 121 <br /> Tank Length (Inches) : 409 <br /> Tank Capacity (Gallons) : 20358 <br /> Tank Buoyancy: 169,834 <br /> Primary Shell Thickness (Inches) : 0.25 <br /> Secondary Shell Thickness (Inches) : 0 <br /> Accessories Weight Extra 0 <br /> Calculated Tank Weight: 12 ,654 12,654 <br /> Sumps I Enclosures <br /> Quantity of Item 1 enclosures 1 <br /> Item 1 : "Diameter" (Inches) : 42 <br /> Item 1 : "Height" (inches) : 60 OK <br /> Quantity of Item 2 enclosures 1 <br /> Item 2: " Diameter" (Inches): 48 <br /> Item 2: "Height" (inches) : 60 OK <br /> Buoyancy contributed by enclosures: 0 <br /> Net Tank Buoyancy: 1573180 <br /> Concrete Slab at Grade <br /> Concrete weight / cubic foot: 150 REVIEWED FOR CONFORMANCE <br /> Surface Concrete Slab Thickness (Inches) : 8 WITH GENERALLY ENGINEERING <br /> PRACTICEAANDD <br /> Weight of concrete Slab: 46 , 017 INDUSTRY STANDARDS. <br /> (Slab size:24'5tank diameter, 48'5 tank length) Ste , <br /> PRE -" `9C <br /> Burial and Water Table Depth <br /> Net saturated soil weight to overcome buoyancy 57.6 R' <br /> Saturated backfill weight / # cubic foot: 120 �ON0.S238 � <br /> Dry backfill weight / # cubic foot: 100 EXPIRES <br /> Tank Burial Depth, Top of tank to grade (Inches) : 60 , n 3-31 -24 v � } <br /> Elevation of water table, " 0 inches" is flooded hole: 60 �► <br /> Weight of Backfill directly over tank: 170 ,343 U <br /> Overburden lost due to sump size and number: 11833 <br /> Net Overburden = 158 ,510 <br /> Deadman Configuration <br /> Deadman Anchor width (Inches) : 0 OK <br /> Deadman Anchor height (Inches) : 0 Aside Parameters <br /> Deadman anchor length (Inches) : 0 OK <br /> Deadman Contribution toward Overcoming Buoyancy: 0 <br /> Total Weight Concrete, Overburden & Deadman contributions: 204 ,527 <br /> If =( ) then insufficient Buoyancy Results: 47, 347 <br /> SAFETY FACTOR: 1 .2 1 .28 ACCEPTABLE <br /> Required <br /> Special Note: <br /> Deadman , holdd owns , overburden backfill and concrete coverall act together as a complete system . <br /> If anyone of these elements is not fully utilized , holddown system may not function adequately. <br /> Disclaimer Statement: <br /> The attached information is supplied to you for information purposes only. <br /> Therefore , Modern Welding Company, their officers , directors nor subsidiaries there of accept any / no <br /> responsibility for the use of this information covered within . This information is advisory only and the use <br /> of the material and methods is solely at the risk of the user. <br /> 1 <br />