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Railway Bridge

Location: North Vancouver, British Columbia

Project Type: Development, detailed design, and construction supervision of new protection structures for the two main bridge piers at CN's railway bridge spanning Burrard Inlet

Client: Canadian National

Description:

CN's Burrard Inlet Railway Bridge consists of a number of fixed bridge spans and one elevator span over the navigable section of the Second Narrows. The bridge spans are supported on reinforced concrete pier structures.

The original timber fendering structures needed replacement. VJA was retained by CN to develop new protection structures and to carry out the design and construction supervision. The design criteria for the protection structure included impact from a 60,000 DWT bulk tanker and a 6,000 DWT barge.

The site is exposed to very strong currents, making the work challenging. The most cost-effective solution was to replace the existing timber structures with new prefabricated steel protection structures with timber sheathing. The protection for each pier consists of two steel frames supported on the concrete caisson and then bolted to the concrete pier columns. Eight fender panels each comprised of a steel frame with timber sheathing are bolted to the steel support frames.

 

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