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In engineering, span is the distance between two adjacent structural supports (e.g., two piers) of a structural member (e.g., a beam). Span is measured in the horizontal direction either between the faces of the supports (clear span) or between the centers of the bearing surfaces (effective span): [1] A span can be closed by a solid beam or by ...
The world's longest suspension bridges are listed according to the length of their main span (i.e., the length of suspended roadway between the bridge's towers). The length of the main span is the most common method of comparing the sizes of suspension bridges, often correlating with the height of the towers and the engineering complexity involved in designing and constructing the bridge. [4]
The definition of cable-stayed bridge deck length used here is: A continuous part of the bridge deck that is supported only by stay-cables and pylons, or are free spans. This means that columns supporting the side span as for example found in Pont de Normandie , excludes most of the side span decks from the cable-stayed deck length.
In August 2003, measurements of post-repair Blenheim Bridge abutments were 209 feet 2 inches (63.75 m) on the upstream side, and 205 feet 6 inches (62.64 m) on the downstream side. [3] Historically, the longest single-span covered bridge on record was Pennsylvania's McCall's Ferry Bridge with a claimed clear span of 360 feet (110 m) (built 1814 ...
The Medora Covered Bridge was the longest covered bridge in the United states with the entire original historic truss still in place with some repairs but no structural changes. [ 1 ] [ 2 ] Measuring the clear span (abutment face to abutment face) of 431 feet 10 inches (131.62 m), [ 3 ] the Medora Covered Bridge is the longest historic covered ...
Connel Bridge has a span of 524 feet (160 m) between the piers, but a clear span of 500 feet (150 m) due to the supports which project from the piers towards the centre of the bridge. [2] The suspended span, the box-shaped section in the middle of the bridge, is 232 feet (71 m) long. [2] The large span without supporting piers was necessitated ...
It was built in 1812 by Louis Wernwag, and was considered his finest bridge design. It had a clear span of 340 feet (103.6 m) and the longest single-span wooden truss to be erected in the United States [2] as well as the first long span bridge to use iron rods. [3] Caption of the 1823 engraving shown at right: THE UPPER FERRY BRIDGE.
The Yale Bridge or Lewis River Bridge spans the Lewis River near Yale, Washington.It was built in 1932 by Cowlitz and Clark counties. The suspension bridge has a clear span of 300 feet (91 m), with a total length of 532 feet (162 m), replacing a previous steel truss bridge at the site.