b'4.SelecttheECPHelicalTorqueAnchorblowcount,N,between8and12blowspersuitabletosupporttheload: Referringto foot.It is estimated that the pile would reach theTable 2Chapter 1 the 1-1/2 solid square pile desiredshafttorsionatamid-platedepthofshaft is selected. It has an Axial Compression about 13 feet.LoadLimitratingof70,000poundsanda 8. Minimum Required Shaft Length:Useable Torsional Strength of 7,000 ft-lbs. L = h mid + L Tip - h FViewing the product data table on Chapter 1Where: h mid = 13 ft(The depth from the surfacePage 6, one can see that the TAF-150-60 12-14 to midway between plates on the shaft.)is a good fit.As an alternate, Table 10 - Chapter L Tip= (3D Plate 1 ) /21, (below) can be used to select a combination of L Tip= (3 x 12 dia / 2) = 18 inplates from rowopposite the1-1/2shaftsize. L Tip= 1-1/2 fth F = -1 ft(The pile cap will terminate at theTable 10. Projected Areas* of Helical Utility Bracket approximately 12 Torque Anchor Plates Inches below grade level.)Helical 6 8 10 12 14 16 L = 13 ft + 1-1/21 ftPlate Dia. Dia. Dia. Dia. Dia. Dia. L = 13-1/2 feet = Shaft lengthShaft Projected Area ft 21-1/2 Sq. 0.181 0.333 0.530 0.770 1.053 1.381 9.Torque Anchor Specifications:1-3/4 Sq. 0.175 0.328 0.524 0.764 1.048 1.375TAF-150-60 12-14 - 1-1/2 solid square bar2 Sq. 0.168 0.321 0.518 0.758 1.041 1.396 lead section on a standard length 5 feet long2-7/8 Dia 0.151 0.304 0.500 0.740 1.024 1.351 shaft with a 12 and 14 diameter plate.3-1/2 Dia 0.130 0.282 0.478 0.719 1.002 1.329TAE-150-60Extension 1-1/2solid4-1/2 Dia 0.086 0.239 0.435 0.675 0.959 1.286 squarebarextension5feetlongwithWe must provide at least 1.73 ft 2of bearing area. hardware, 2required (ThecouplingThe combination of 12 & 14 diameter plates overlaps3inchesprovidinganeffectiveon the 1-1/2 solid square shaft provides a total length of 4-9)area of 1.82 ft 2 .Select - TAF-150-60 12-14TAB-150-SUB UtilityBracketAssembly.5. Installation Torque: Use Equation 2This foundation bracket fits over the 1-1/2squarebarandmountstotheperimeterChapter 1 to calculate the installation torque for beam.The bearing plate provides 68-1/4 in 2this anchor. at the under side of the foundation for loadT = T u/ k Where, transfer.T u= 19,500 lb(Step 2) k = 10 (Table 12Chapter 1) ThetotallengthoftheassembledTorqueT = 19,500 lb / 10 ft -1 Anchor is 14-1/2 ft.T = 1,950 ft-lbUse 2,000 ft-lb TorqueAnchors shallbespacedat7-1/2feet6. Torque Anchor Capacity Verification: A center to centerreview of Table 2Chapter 1 indicates that the Installation Torque shall be 2,000 ft-lb or more1-1/2solidsquarebarTorqueAnchorhasa averaged during the last 3 feet of the installation.Useable Torsional Strength of 7,000 ft-lb, which Target depth is 13-1/2 feet or more.is more than adequate for this application.The Note:Itisrecommendedtoorderadditionalproductselectionshouldworkbased uponthe extension sections because the shaft torque mightsoilreportstatingthatthefirmtostiffclay not be achieved at 14-1/2 feet deep.becomesmoredenseasthedepthincreases. 10.FoundationRestoration:OncealloftheThere was no mention of rocks, debris or other TorqueAnchorpileshavebeeninstalledandobstructions.Table 11Chapter 1 verifies that the Utility Brackets mounted, the structure maytwo 3/8 thick helical plates have a mechanical be restored to as close to the original elevation asultimatecapacityof80,000pounds.The the construction will permit.mechanical capacity of the pile is excellent.7. Installed Product Length: Termination depthA pile cap, lift assembly and hydraulic jackfor the helical plates is targeted within the stiff are installed at each placement.silty clay.The data indicates that the soil has aAllhydraulicjacks shallbeconnectedtoavariance in the Standard Penetration Test (SPT) handpumpandgaugethroughamanifoldECP Technical Design ManualTorque Anchor Design Examples2021 Earth Contact Products, L.L.C.2021-09 Chapter 5Page 98 All rights reserved'