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London South Branch Railway Bridge

London South Branch Railway Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: July 12, 2005, August 5, 2006, and April 13, 2019

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Key Facts

Facility Carried / Feature Intersected
Railroad (Canadian National) Over South Branch Thames River
London: Middlesex County, Ontario: Canada
Construction Date and Builder / Engineer
1899 By Builder/Contractor: Unknown

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
Not Available
Structure Length
Not Available
Roadway Width
Not Available
1 Main Span(s)
NBI Number
Not Applicable

Historic Significance Rating (HSR)
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Bridge Documentation

Most of southwestern Ontario is devoid of pin connected structures, but here in London there are several, although this is the only pin-connected railway bridge in the area. Even more unusual is where the deck is positioned on the bridge. The top chord actually is well above the deck, which gives the bridge a slight feeling of pony truss when you are on the deck. The bridge is in fact mostly a deck truss however, since the vast majority of the truss is below the deck. Chicago often positioned its bascule bridge trusses like this on many bridges, and coined the term "railing height" truss, and the term seems appropriate for this bridge, although when this bridge was built such a term did not exist. The bridge was likely described as a deck truss when it was built. Raising the top chord up a slight distance may have been a way to increase clearance for the river. The end posts on the truss are vertical, which gives the bridge a square appearance. The bridge has v-lacing and lattice on many members. Nice views from below this bridge can be seen from a bike path that travels along the east side of the river here. In fact this path is one of the things that makes visiting bridges in London enjoyable, since it follows the river consistently, leading to several of the heritage bridges in the city. This bridge carries frequent train traffic, which leaves a lot of opportunity for photos of a train crossing the bridge. The bridge sits on stone abutments.


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Maps and Links: London South Branch Railway Bridge

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