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3:27 PM Buoyancy of Underground Tanks <br />Fiberoless Straps with Deadman Anchors -r <br />8/14/97 <br />"Bold Typed Items are Input Values" <br />Modern Welding Co. of California <br />Underground TankDescription: JUSA Petroleum, Lo I, 12,000 gallon Jacketed Co <br />Tank Model: <br />GS13 <br />r <br />Tank Diameter O.D.lInches : <br />97 <br />Tank Length (Inches): <br />384 <br />Capacity(Gallons): <br />121e2 <br />Primary Shell Thickness (Inches): 1 <br />0.24 <br />Tank Sua ancy: <br />002.47-2 <br />-- Item 1: "Diameter" Inches): <br />42 <br />_ ___ _ Item 1: "Haight" (Inches): 1 <br />00 <br />_ <br />Itrrn 2: "Diameter_(luchae : <br />42 <br />Item Z Height" (inches): 1 <br />e0 <br />_ __ ____^ _ Buoyancy Lontrlbuted by enclosures: <br />6004 I <br />Total buoyant Force of lank: <br />108,478 <br />Caldulated Tank Weight: <br />8013 <br />_-_ Net Buoyancy required for Floalout: <br />99,463 <br />Concrete Slab at Grade <br />Concrete weight / cubic foot: <br />130 <br />—_Surface Concrete Slab Thickness (Inches): <br />e <br />Weight of oonorele Slab: <br />12269 <br />Slab size:24"<tank diameter, 48"< tank length) <br />Burisi end Water Teble Depth <br />_ Net saturated soil weight to overcome buoyancy <br />Saturated backfill weight / # cubic foot: <br />57.8 <br />120 <br />Dry backfill weight / # cubic foot: <br />100 <br />_ <br />Tank Burial Depth, Toy of tank to grade (inches : <br />Movailon_of_wateitable,"Olnches"isfloodedhols: <br />___ 1iVeight of Backfill ireclly over laink:j <br />60 <br />0 <br />_ OK <br />79909 <br />-- ----- — <br />Dletance from Tank'e side to Excavation well (Inches :! <br />12 <br />OK <br />Deadman Anchor width (Inches): <br />0 <br />OK <br />Deadman Anchor height (Inches); <br />Deadman anchor length orches : <br />12 <br />6—OK <br />Deadman Contribution toward Overcoming Buoyancy: <br />0 <br />Total Cunciele, overburden, deadman contributions: <br />- -- <br />92239 <br />-. <br />-- -If,..( _) (hen Insurriclent Buoyancy Resu ts: <br />SAFETY FACTOR: <br />--_---- — <br />— �— <br />1.2 <br />RegUlre <br />(7,224) <br />0.93 INSUFFICIENT <br />Fiberglass Holddown Straps <br />_ Nei Buuyancy reaction to be overcome by straps <br />Nwnl)91 of Holddown straps used on tank: <br />Maximum Allowable Land associated with strap: <br />- —. -_ <br />Straps combined strength to overcoming buoyant : <br />_ <br />0 <br />o <br />28500 <br />0 <br />Straps not Rend _ <br />Strap Size: 3/18" x 2' each <br />ounds / strpR <br />_. _ <br />pounds <br />SAFETY FACTOR: <br />1.50 <br />Required <br />#DIV/ei #DIV/01 <br />