Steel is a common form of sheet pile because it offers good resistance to high driving stresses, excellent watertightness, and can be welded or bolted to increase length. They are connected by interlocking. Steel sheet piles are sheet sections with interlocking edges that are driven into the ground to provide earth retention and excavation support.

Steel sheet piles are typically made of steel but can also be made of wood or reinforced concrete. They are commonly used for retaining walls, land reclamation, underground structures (such as parking lots and basements), riverbank protection in marine locations, seawalls, cofferdams, and more.

The selection of steel sheet piles depends on factors such as:

1. The type of work, whether permanent or temporary.

2. Site conditions.

3. The required pile depth.

4. The bending moments involved.

5. The nature of the structure.

6. The type of protection required.