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5 of 8 <br />MAX <br />Project Name: Foundation Stabilization/Lift - Everett Project Number: S200831-1 <br />Project Location: 4514 Seahurst Ave, Everett, WA 98203 <br />Client's Name: Andi Holm, Project Coordinator - R&R Foundation Specialist, LLC <br />Subject: 2 - 7/8" 0 Helical Pile - Compression Torque Chart - Digga MM-10K <br />Ideal Foundation Systems 2-7/8"0 Helical Pile 0.2034nch wall thickness -Soil Capacity er ESR-3750 <br />DIGGA 1OK Drive Head <br />Pressure (psi) <br />Torque, T <br />(It'Ibs) <br />Torque Correlation Factor, K, <br />Compression (ft-') <br />Ultimate Axial Compressive Capacity, <br />P. = K,•T (kips) <br />Allowable Axial Compressive <br />Capacity, P. = 0.5•p� (kips) <br />500 <br />1,740 <br />9 <br />15.7 <br />7.8 <br />600 <br />2,088 <br />9 <br />18.8 <br />9.4 <br />700 <br />2,436 <br />9 <br />21.9 <br />11.0 <br />800 <br />2,784 <br />9 <br />25.1 <br />12.5 <br />900 <br />3,132 <br />9 <br />28.2 <br />14.1 <br />1000 <br />3,480 <br />9 <br />31.3 <br />15.7 <br />1100 <br />3,828 <br />9 <br />34.5 <br />17.2 <br />1200 <br />4,176 <br />9 <br />37.6 <br />18.8 <br />1300 <br />4,524 <br />9 <br />40.7 <br />20.4 <br />1400 <br />4,872 <br />9 <br />43.8 <br />21.9 <br />1500 <br />5,220 <br />9 <br />47.0 <br />23.5 <br />1600 <br />5,568 <br />9 <br />50.1 <br />25.1 <br />1700 <br />5,916 <br />9 <br />53.2 <br />26.6 <br />1800 <br />6,254 <br />9 <br />56.4 <br />28.2 <br />1900 <br />6,612 <br />9 <br />59.5 <br />29.8 <br />2000 <br />6,960 <br />9 <br />62.6 <br />31.3 <br />2100 <br />7,308 <br />9 <br />65.8 <br />32.9 <br />2200 <br />7,656 <br />9 <br />68.9 <br />34.5 <br />23F. <br />1 8,000 <br />9 <br />72.0 <br />36.0 <br />i.) DIGGA 1OK 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 Manufacturing, Inc., the <br />maximum installation torque rating of a 2-7/8"0 helical pile (0.203-inch wall thickness) is 8,000 ft'Ibs. Final installation 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 structural package, but shall not <br />exceed the maximum allowable capacity for any part of the pile assembly. <br />iv.) Refer toESR-3750and 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 torque reading instruments connected <br />to the installation equipment. <br />Kt = Torque correlation factor per ESR-3750 <br />P. = Ultimate axial compressive capacity (in kips) of helical pile <br />P. = 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: P. = (T-KJ/2 <br />vii.) 1 kip = 1,000 Ibs <br />