Lift bridge

A lift bridge or vertical lift bridge is a type of movable bridge in which a span rises vertically while remaining parallel with the deck.

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The vertical lift offers several benefits over other movable bridges such as the bascule and swing span bridge. Generally speaking they cost less to build. The counterweights in a vertical lift are only required to be equal to the weight of the deck, whereas bascule bridge counterweights must weigh several times more than the span being lifted. As a result, heavier materials can be used in the deck and so this type of bridge is especially suited for heavy railroad use.

Related Topics:
Bascule - Swing span bridge

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The biggest disadvantage to the lift bridge is the height restriction that results from the deck being above the passageway.

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