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4 of 5 <br />MAX <br />Project Name: Foundation Stabilization/Lift - Everett Project Number: S220725-1XR <br />Project Location: 1007 49th PI SW, Everett, WA 98203 <br />Client's Name: R&R Foundation Specialist, LLC <br />Subject: 2 - 7/8" 0 Helical Pile - Compression Torque Chart - Digga HH-6K <br />Ideal Foundation Systems 2-7/8"0 Helical Pile (0.203-inch wall thickness) - Sail Capacity per ESR-3750 <br />DIGGA 6K Drive Head <br />Pressure <br />(psi) <br />Torque, T <br />(Wills) <br />Torque Correlation Factor, <br />Kt <br />Kt <br />(ft 1) <br />Ultimate Axial Compressive <br />Capacity <br />P. = Kt*T, (kips) <br />Allowable Axial Compressive <br />Capacity <br />Pe = 0.5*P,,, (kips) <br />500 <br />1,554 <br />9 <br />14.0 <br />7.0 <br />600 <br />1,865 <br />9 <br />16.8 <br />8.4 <br />700 <br />2,176 <br />9 <br />19.6 <br />9.8 <br />800 <br />2,486 <br />9 <br />22.4 <br />11.2 <br />900 <br />2,797 <br />9 <br />25.2 <br />12.6 <br />1000 <br />3,108 <br />9 <br />28.0 <br />14.0 <br />1100 <br />3,419 <br />9 <br />30.8 <br />15.4 <br />1200 <br />3,730 <br />9 <br />33.6 <br />16.8 <br />1300 <br />4,040 <br />9 <br />36.4 <br />18.2 <br />1400 <br />4,351 <br />9 <br />39.2 <br />19.6 <br />1500 <br />4,662 <br />9 <br />42.0 <br />21.0 <br />1600 <br />4,973 <br />9 <br />44.8 <br />22.4 <br />1700 <br />5,284 <br />9 <br />47.6 <br />23.8 <br />1800 <br />5,594 <br />9 <br />50.3 <br />25.2 <br />1900 <br />5,905 <br />9 <br />53.1 <br />26.6 <br />2000 <br />6,216 <br />9 <br />55.9 <br />28.0 <br />2100 <br />6,527 <br />9 <br />58.7 <br />29.4 <br />i.) DIGGA 6K Drive Head differential pressure display to torque output has been pulled from the attached conversion charts provided by DIGGA. <br />ii.) Per Table 5A of ESR-3750, the maximum installation torque rating of a 2-7/8" 0 helical pile (0.203-inch wall thickness) is 8,300 ft*Ibs. Per Ideal <br />Manufacturing, Inc., the maximum installation torque rating of a 2-7/8" 0 helical pile (0.203-inch wall thickness) is 8,000 ft*Ibs. Final installation <br />torque shall not exceed the lesser of these limiting values. <br />III.) Piles shall reach a torque that correlates with an allowable capacity that meets or exceeds the maximum allowable load demand as listed in the <br />structural package, but shall not exceed the maximum allowable capacity for any part of the pile assembly. <br />iv.) Refer to ESR-3750 and Ideal Manufacturing, Inc. documents for additional information and requirements. <br />v.) Definitions per ESR-3750: <br />T = Final Installation torque in ft*Ibs; the last torque reading taken during pile installation, using, for example, the <br />torque reading instruments connected to the installation equipment. <br />Kt = Torque correlation factor per ESR-3750 <br />P = Ultimate axial compressive capacity (in kips) of helical pile <br />Pa = Allowable axial compressive capacity (in kips) of helical pile <br />vi.) For torque readings between those listed, use the following equation to determine the allowable capacity: Pa = (T*Kt)/2 <br />vii.) 1 kip = 1,000lbs <br />