e-mosty June 2018 American Bridges American Bridges | Page 58

The tower structural members are comprised of closed circular hollow structural sections (HSS) 508mm in diameter for the main tower legs and varying from 168 to 273mm in diameter for the diagonal members. The tower design had to accommodate the counterweights, the counterweight and span guides as well as the access stairs. The abutment and pier piles are closed ended and filled with concrete for added stiffness. At the piers, several pipe piles had to be driven open ended to account for the stiffening of the soil within the cofferdam from the pile driving operations. Access for the piers construction was facilitated by the construction of a temporary work bridge from shore. The counterweights for the lift span were housed inside the towers and are comprised of built-up steel boxes filled with steel plates. The machine rooms are accessible using stairs located within the towers. An aerial view of one of the towers showing the machine rooms is stunning and an attractive feature of this bridge. The aesthetically pleasing bridge has become an iconic structure and an architectural landmark for the town of Placentia, an integral part of the local culture and an important part of the region’s touristic hub, as a focal point in the community attracting visitors and new businesses to the area. The abutment foundations are supported on30-324mm diameter friction pipe piles driven about 16.5m into the soils at the north abutment and 20m at the south abutment. The use of steel enabled the designers to deliver a project that surpassed the imposed design requirements, providing the best sustain- able option for optimal net positive effect on social, economic, and environmental aspects. CP RAIL BRIDGE AT OUTREMONT AVENUE WITHIN THE UNIVERSITY OF MONTREAL CAMPUS Project Team Fabricator: Central Welding & Iron Works Engineer: Les Consultants SMi Detailer: Genifab Contractor: Roxboro Excavation The city wanted to implement an Architectural element and distinctive effort to obtain an unparalleled result. In 2013, the University of Montréal, a major university in the metropolitan area, started construction of its new campus, the MIL Campus, in Outremont, on the abandoned grounds of a former Canadian Pacific yard. However, before it could proceed with the work, it was necessary to open the site and move, from south to north, a double track of the old railway network. 2/2018 This initiative required precision in many aspects, including from quality and from the point of view of work that would be accompanied by a lighting component. These target points were to eventually take a simple and conventional railway bridge and turn it into a beautiful bridge project of uniqueness and grace that everyone would appreciate.