Footbridge in Calgary crosses 53 metres in single span

Cohos Evamy has designed an innovative footbridge that is officially opening June 9. It is part of the Glenmore Trail Causeway Upgrades in southwest Calgary.
The Glenmore/Legsby pedestrian overpass crosses eight lanes with a single span, 53-metre post-tensioned bridge.
It consists of two cantilevered high-perforcement concrete abutments and a drop-in T-Section Ductal girder with an arch. The girder measures 33.6 metres long, 3.6 metres wide and is only 1.1 m deep at mid-span. Prefabricated, it weighs 100 tons and has a fibre matrix that is heat-treated for 48 hours at 90 degrees C. The beam was post-tensioned with two bundles of strands and glass fibre reinforced plastic bars (GFRP) as an extra safety precaution.
Gerald Carson, P.Eng. was the project engineer at Cohos Evamy, working with Dr. Jim Montgomery, P.Eng and Dr. Jeff DiBattista, P. Eng., also of the firm.