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Upper Peninsula Regional Digitization Center

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    • Gismo

    • Mackinac Bridge (Mich) ; Bridges -- Design and construction
    • Driving H-beams as an angle is a tough job. The ""gismo"" made this demanding job go quite well. The ""gismo"" was an adaptation of a steam pile driver that could operate at pre set angles and drive the pile right to the bottom of the cofferdam,...
    • Gismo

    • Mackinac Bridge (Mich) ; Bridges -- Design and construction
    • Driving H-beams at an angle is a tough job. The ""gismo"" made this demanding job go quite well. These piles were driven to refusal at bedrock and gave the pier ""legs"" to stand on just as a chair has legs that allow it to sit on the floor.

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