Helix Sizes Explained

Understanding how the helix size relates to the load bearing capacity of helical piles can shed some light onto how helical piles can be designed and utilized for various projects and soil conditions.

The bearing strength of a helical pile is determined by a few factors. The physical properties of the steel, such as the diameter or shape of the tube, the welds between the helix, and the thickness and strength of the steel.

Regardless of whether the pile is being installed in clay or sand soil, the torque to correlation factor (Kt) for each shaft size, is multiplied by the effective installation torque (T), resulting in the ultimate capacity for each pile. The standard equation for ultimate capacity is Kt * T.