b'Table of ContentsChapter 1 - ECP Torque Anchors Technical Design ManualIntroduction 3ECP Torque Anchors3Torque Anchor Components 3Product Benefits 4Product Limitations 4ECP Torque Anchor Product Designations 5Capacities of ECP Helical Torque Anchors5Product Descriptions 6Tables of ECP Torque Anchor Lead and Extension Products 6Tables of Foundation Bracket Products 12Tables of Pile Cap Products 14Tables of Transitions and Wall Plate Products 15Symbols Used In This Chapter 16Design Criteria 16Preliminary Design Guidelines 17Equation 1. Ultimate Theoretical Capacity 17Soil Behavior 17Cohesive Soil (Clays & Silts) 18Cohesionless Soil (Sands and Gravels) 19Mixed Soils 21Effects of Water Table Fluctuations and Freeze-Thaw Cycle 22Budgetary Capacity Estimates by Quick-Solve method 23Soil Classification Table 23Holding Capacity Tables 25Torque Anchor Holding Capacity 26Installation Torque 26Helical Torque Anchor Design Considerations 27Projected Areas of Helical Torque Anchor Plates 27Allowable Helical Plate Capacities 27Relationship Between Installation Torque and Torque Anchor Capacity 27Motor Torque vs. Ultimate Capacity Table 28Equation 2:Helical Installation Torque 28Torque Anchor SpacingX: 29Plate Embedment in Tension Applications 29Preventing Punch Through 29Tieback Design Considerations 29Placement of Tiebacks 30Hydrostatic Pressure 30Basement Tieback Applications 30Simple Retaining Wall Tieback Applications 31Simple Retaining Wall Tieback Applications With Soil Surcharge 31Ultimate Tieback Capacity Selection 31Horizontal embedment LengthL 031Installation Angle 32Critical Embedment DepthD 32Torque Anchor Installation Limits 32Shaft Strength 32Shaft Stiffness 32Buckling Loads in Weak Soils 33Allowable Compressive LoadsPile in Air 35ECP Helical Torque Anchors Technical Service Manual2021 Earth Contact Products, L.L.C.2021-09 Chapter 1 - Page 2 All rights reserved'