InfraStructures - August 2021 - Modular Steel Bridge Connects Communities in Ontario

Modular Steel Bridge Connects Communities in Ontario

A modular steel bridges from Acrow has been installed to replace an aging structure over a stream in Tay Valley Township, a remote region about 90 km southwest of Ottawa, Ontario. The crossing connects 2 communities and continued access is essential – without a bridge, a lengthy detour would mean inconvenience for residents and critically impact response time of emergency vehicles. After a 2018 inspection, of the structure of the single-lane Bolingbroke Bridge was found severely deteriorated. A weight restriction was imposed and a full replacement recommended.

Acrow’s modular panel bridge proved an ideal solution for the project. Firstly, it fulfilled the need for minimal concrete work (foundations only). This benefit, combined with the ease and speed of assembly on-site using prefabricated components, ensured that the construction process would be quick. The construction area was remote and consideration had to be given to ease of transporting bridge materials to site, ideally using compact modular components, rather than large steel or concrete beam sections on narrow rural roads. Furthermore, it was estimated there would be reduced overall costs when compared to building with conventional reinforced concrete slab on steel or concrete girder systems.

The 42.7 m single-lane bridge is 5.5 m wide and has a steel deck with asphalt overlay. It is planned for a 75-year design life in accordance with the Canadian Highway Bridge Design Code. The bridge was designed to accommodate an upward slope of 4.27% from the north abutment to the south and installed using a crane-assisted launch, with guidance from Acrow’s site representative. Total construction time for the superstructure was 8 working days with a 5-man crew, with the bridge opening in November 2020.

Source: Acrow Canada

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