Screw piles

Screw piles are typically manufactured from high-strength steel[1] using varying sizes of tubular hollow sections with helical flights.

Helical steel plates are welded to the pile shaft to suit the site specific ground conditions.

Composites offer significant advantages over steel in small screw pile manufacture and installed performance.

Screw piles are used extensively, and their usage has extended from lighthouses to rail, telecommunications, roads, and numerous other industries where fast installation is required, or building work takes place close to existing structures.

Some common applications for helical pile foundations include residential decks, sheds, cement pads, preformed stairs and grade beams.

[5] Newest emerging screw piles with large-diameter shaft pipes, which require large equipment to install, can withstand loads in excess of 2500 kN.

Most industries use screw piling experts due to the cost efficiencies and, increasingly, the reduced environmental impact.

photo of a stack of helical anchors at a construction site
Helical anchors
Line drawing of a short helical blade on a long shaft. The left end is labelled the "pile toe", near this end is the "screw or helix", and at the other end of the "pile shaft" are rectangular "drive lugs" and a small, circular "shear bar hole".
A screw pile