Rolling Lift Bascule Bridge

It is constructed in the same way as a single leaf bridge however the counterweights are placed beneath the bridge in this case.

Rolling lift bascule bridge.

A vertical lift bridge is pulled up and down from counterweights in two tall towers on either side of it. Variations these bridges have three versions or designs which are the fixed trunnion the rolling lift trunnion and the rall type. Bridges of this type do not pivot about a hinge point but roll back on curved tread plates attached to the girders of the main span. There are also a few bascule bridges which have no counterweight at all the most famous being the 16th street bascule bridge in milwaukee wisconsin in the united states.

The corporation bridge is a scherzer rolling lift bascule bridge over the old dock alexandra dock in grimsby north east lincolnshire england built in 1925 it replaced an earlier swing bridge dating to 1872. Bascule bridges are the most common type of. The name comes from the french term for balance scale which employs the same principle. If there is a hinged connection it s referred to as ophaalbrug literally drawbridge.

Available in single and double track versions. Bascule bridges have counterbalance weights positioned either in the deck or in overhead balance frames as shown to assist in the lifting operation of the deck. This design allows a greater clearance of the waterway for a given opening angle. A bascule bridge also referred to as a drawbridge or a lifting bridge is a moveable bridge with a counterweight that continuously balances a span or leaf throughout its upward swing to provide clearance for boat traffic it may be single or double leafed.

Note that in dutch basculebrug only refers to bascule bridges that have their counterweight rigidly connected to the bridge deck. Double leaf bascule bridges are more common. Ultimately though it was the trunnion bascule bridge that became a chicago. The bridge has a counterweight and raises with a rolling lift motion that moves the bridge up and out of the.

The scherzer rolling lift bridge is similar to a rocking chair with large counterweights above the road level to help balance the bridge as it opens and closes. Our model is based on a bridge built in the early 1900 s and was designed by the scherzer rolling lift bridge co. The rolling lift bridge rocks back and forth on a track while opening. Operating rolling lift bridge with the optional motor kit sold separately.

Pegasus bridge and the structure that replaced it in 1994 are examples of a distinct sub type of bascule bridge the scherzer rolling lift bascule bridge or rolling bridge.