Steel sheet piles can be divided into three shapes: U-shaped, Z-shaped, and W-shaped. They are also divided into light and ordinary cold-formed steel sheet piles according to wall thickness. The wall thickness of 4 to 7 mm is for light steel sheet piles, and the wall thickness of 8 to 12 mm is for ordinary steel sheet piles, bridge construction, cofferdams, large pipelines, temporary trench excavation, soil retaining, water retaining, sand retaining wall, wharf, unloading yard retaining wall, retaining wall Earth walls, embankments, etc.