McKnight Boulevard Pedestrian Overpass

Calgary, AB

Located near 44 Street in northeast Calgary, a pedestrian overpass was needed to allow pedestrians to safely reach a school and a commercial district on either side of the busy, multi-lane McKnight Boulevard.

Project Services

ISL provided preliminary engineering, detailed design and construction administration for a twin girder pedestrian bridge, as well as the associated regional pathway extensions, utility diversions and drainage and landscape elements.

Slender Design

To cross 55 metres of roadway with a depth-to-span ratio of greater than 20, ISL configured the union of two steel plate girders with a maximum depth of 2.4 metres, thereby exceeding the design criteria for a slender bridge profile.

Overnight Installation

To minimize traffic disruptions on the busy McKnight Boulevard, it was decided to erect the twin bridge girders in just one night. Carefully planned and executed, temporary traffic control and lighting allowed both the girders and the precast decking units to be installed successfully with minimal disturbances.

Winter Conditions

To stay on schedule, much of the abutment concrete pours and bridge construction took place during harsh winter conditions. Special portable industrial heaters and insulated tarpaulins protected the freshly poured concrete from the cold weather.

Project Completion

The McKnight Boulevard Pedestrian Overpass opened to the public in September 2009.

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