Why screw piles are chosen for piers 1. Strength and stability in soft soils The bottom soil is rarely dense. Along the banks of rivers and lakes, there is silt, sand, or clay. Driving concrete or wood into these areas is pointless: they are "drift," squeezed, and sink. A screw pile, on the other hand, is screwed into a dense layer below the loose bottom soil—approximately 1.5–2 meters. The blade acts as an anchor, firmly securing the pile even in a shifting environment. Simply put, a screw pile is held in place not by its weight, but by its grip on the ground. 2. Water and frost resistance Unlike concrete, which absorbs moisture and cracks when frozen, piles are protected by an anti-corrosion coating. A zinc coating or epoxy paint insulates the metal from contact with water. Even when the soil freezes and thaws, the pile maintains its strength—it "plays" with the soil movement without deforming. 3. Minimal impact on the ecosystem Helical piles are ins...