Tubular and H piles (King Piles) are combined with sheet piles to produce a combi, or reinforced sheet pile wall. Interlocks are welded to these tubular and H piles to allow elements to be joined.
Because their robust construction it gives the resultant combi wall, the ability to endure extreme loads. Combi walls are frequently used in applications such as tunnel entrances, deep excavation pits, parking facilities, and quay walls. Combi walls receive their structural strength from the King piles, while intermediate sheet piles are used to make the wall continuous and watertight.