![]() Historically, wood piles used splices to join multiple segments end-to-end when the driven depth required was too long for a single pile today, splicing is common with steel piles, though concrete piles can be spliced with mechanical and other means. Steel piles are either pipe piles or some sort of beam section (like an H-pile). ![]() They are reinforced with rebar and are often prestressed. Concrete piles are available in square, octagonal, and round cross-sections (like Franki piles). Wooden piles are made from the trunks of tall trees. Driven piles are constructed of wood, reinforced concrete, or steel. Prefabricated piles are driven into the ground using a pile driver. ![]() Illustration of a hand-operated pile driver in Germany after 1480
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