Design of Steel Pile Foundations for Transmission owers

A method of designing steel piles for transmission towers using published theories for uplift and lateral loads is presented. Allowable horizontal deflection is not considered; however, with an adequate factor of safety applied to the ultimate lateral pile load, the horizontal deflection could be within tolerable limits for transmission tower foundations. Combined uplift and lateral load analysis indicate that the uplift resistance is increased by lateral loads. Although the lateral load of a battered pile is increased due to the batter, it is recommended that this increase be regarded as an additional safety factor for the commonly used batters.