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Buoyancy of Underground Tanks 10/18/01 <br /> Fiberglass Straps with Deadman Anchors <br /> "Bold Typed Items are_Input Values" <br /> Underground Tank Description: 30000 gallon <br /> Tank Model: GSII <br /> Outer Tank Diameter QnShes : 126 <br /> Tank Length(Inches): 556 F250, 49 Tank Capacity(Gallons): 30010Tank Buoyan <br /> Primary Shell Thickness(Inches): _0.3125 _ <br /> Secondary Shell Thickness(Inches): 0 <br /> _ Accessories Weight Extra 800 <br /> Calculated Tank Weight 22,073 -22,073 <br /> Sumps I Enclosures <br /> Quantity of Item 1 enclosures 4 <br /> Item 1:"Diameter"(Inches): 42 <br /> _ Item 1: "Height"(inches): 48 OK <br /> _ <br /> Quantity of Item 2 enclosures 0 <br /> Item 2:"Diameter"(Inches): 0 <br /> Item 2: "Height"(inches): 0 OK <br /> Buoyancy contributed by enclosures: 9606 <br /> Net Tank Buoyancy: 237,882 <br /> Concrete Slab at Grade <br /> Concrete weight/cubic foot 150 <br /> Surface Concrete Slab Thickness(Inches): 8 <br /> W ' ht of concrete Slab: 36,743 — <br /> (Slab size:24">tank diameter,48">tank length) '" '�' 'S/ <br /> Burial and Water Table Depth <br /> Net saturated soil weight to overcome buoyancy 57.6 <br /> Saturated backfill weight/#cubic foot 120 <br /> Dry backfill weight/#cubic foot 100 r" <br /> Tank Burial Depth,Top of tank to grade(Inches): 48 <br /> Elevation of water table,"0 inches"is flooded hole: 0 <br /> Weight of Backfill directly over tank: 124,980 <br /> Overburden lost due to sump size and number: 9637 <br /> Net Overburden= 115,343 <br /> Deadman Configuration 4 <br /> Deadman Anchor width(Inches): 24 OK <br /> Deadman Anchor height(Inches): 12 1 OK <br /> Deadman anchor length(Inches): 556 OK <br /> Deadman Contribution toward Overcoming Bu ancy: 238,413 <br /> Total Weight Concrete,Overburden&Deadman contributions: 390,499 <br /> If=( )then insufficient Buoyancy Results: 152,618 <br /> SAFETY FACTOR: 1. ACCEPTABLE <br /> 11 Required <br /> Fiberglass Holddown Straps <br /> Net Bouyancy reaction to be overcome by straps 85,795 <br /> Number of Holddown straps used on tank: 9 Strap Size:3/16"x 2"each <br /> Ma>omum Allowable Load associated with strap: 28,500 pounds/strap <br /> Straps combined strength to overcoming buoyancy: 256,500 pounds <br /> SAFETY FACTOR: 1. L <br /> —Te�quired <br /> Special Note: <br /> Deadman,hokidowns,overburden backfill and concrete cover all act together as a complete s stern. <br /> If anyone of these elements is not fully utilized,hokidown system ma%on <br /> t function adequately. <br /> Disclaimer Statement: <br /> The attached information is supplied to you for information purposes . <br /> Therefore,Modem 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 advwry only and the use <br /> of the material and methods is solely at the risk of the user. <br /> 1 <br />