The pedestrian bridge over McKnight Boulevard at 44 St. NE in Calgary has a unique shape. Imagine an arched, twin girder bridge, laced together with angle bracing. Now tilt the eight-foot deep girders out from center exactly 11 degrees, add an architecturally sloped plate from the bottom of the exterior flange up to the web at 60 degrees, add web doublers five feet high by 140 feet long, and complete with a 14 inch camber. Now take the 160,000 lb weldment and make it 185 feet long. Needless to say, this project was a challenge.
How do you fabricate such a thing? Have two draftsmen scrutinize every line, angle, and dimension. In addition, enlist 17 of the finest fitters and welders, add many years of knowledge and experience, and use a little bit of imagination. Bridge Division was up to the task. With a little help from Waiward Steel and Transtech, we were able to get it out of the shop, get it painted, and transport it to the job site.
Erection of this complex project involved a complete night road closure, and a hard-working crew made up of several companies. Cranes eventually hoisted the bridge into its final position.