518 51ST ST SW 2023-06-23 - Laserfiche WebLink

• 7 of 23 A PROJECT NO. SHEET NO.Irtlr.- S201001-1XR ice` ��IP PROJECT 518 51ST ST SW, EVERETT, WA 98203 LONGITUDE SUBJECT ONE TWENTY° ENGINEERING&DESIGN BY FY DATE 12/29/2020 Ideal Foundation Systems 2-7/8••0 Helical Pile(0.203-inch wall thickness)-Soil Capacity per ESR-3750 DIGGA 10K Drive Torque Correlation Factor, Kt Ultimate Axial Comp ressive Allowable Axial Compressive Head Torque,T Pressure (f[•lbs) Compression Capacity, P„=K,'T Capacity, P,=05•P„ (psi) 1ft'1 (kips) {kips) 500 1,740 9 15.7 7.8 600 2,088 9 18.8 9.4 700 2,436 9 21.9 11.0 800 2,784 9 25.1 12.5 900 3,132 9 28.2 14.1 1000 3,480 9 31.3 15.7 1100 3,828 9 345 17.2 1200 4,176 9 37.6 18.8 1300 4,524 9 40.7 20.4 1400 4,872 9 43.8 21.9 1500 5,220 9 47.0 23.5 1600 5,568 9 50.1 25.1 1700 5,916 9 53.2 26.6 1800 6,264 9 56.4 28.2 MAX 1900 6,612 9 595 29.8 'See Note viii 2000 6,960 9 62.6 31.3 2100 7,308 9 65.8 32.9 2200 7,656 9 68.9 345 2300 8,000 9 72.0 36.0 'See Note ii I.)DIGGA 10K Drive Head differentia/pressure display to torque output has been pulled from the attached conversion charts provided by DIGGA. 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 maximum installation torque rating of a 2-7/8"0 helical pile(0.203-inch wall thickness)is 8,000 tt•Ibs.Final installation torque shall not exceed the lesser of these limiting values,. 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 exceed the maximum allowable capacity for any part of the pile assembly. iv.)Refer to ESR-3750 and heal Manufacturing,Inc. documents for additional information and requirements. v.)Definitions per ESR-3750: T=Final Installation torque in ft`lbs;the last torque reading taken during pile installation,using,for example,the torque reading instruments connected to the installation equipment. K,=Torque correlation factor per ESR-3750 P„=Ultimate axial compressive capacity(in kips)of helical pile P,=Allowable axial compressive capacity(in kips)of helical pile vi.)For torque readings between those listed,use the following equation to determine the allowable capacity:P,=(T'K,)/2 vii.)1 kip=1,000 lbs viii.)Per Note 3 of Ideal Group Dwg No.278TFG dated 4/23/20,the allowable structural capacity for the 2 7/8"TRU-FORCE Underpinning Bracket is limited to 30 kip. L120 ENGINEERING&DESIGN