Triple whipple truss
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![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/62/Triple-whipple-trus.svg/220px-Triple-whipple-trus.svg.png)
The triple whipple truss is a style of truss bridge that was used in the 19th century. In such a bridge, the diagonals are under tension. They cross two neighboring verticals rather than connecting to it like a Pratt truss.
The only remaining example of this style in the United States is the Laughery Creek Bridge in Indiana.