Award-winning InQuik system uses Magnelis® to install innovative bridges quickly
A key challenge was to identify a good material for the formwork which holds the concrete until it dries completely. “At first we thought about using galvanised steel, but over time this will rust and fall away,” says Logan Mullaney, managing director of InQuik Bridging Systems. “While the formwork is sacrificial, we realised that the sight of corroding metal would reduce user confidence in the bridge and increase the amount of maintenance required. We needed a more durable solution.”
InQuik was introduced to Magnelis® through a contact in Australia. “Magnelis® allows us to leave the formwork of the bridge in place as it has an aesthetically pleasing finish – and it is durable,” says Logan Mullaney.
The Magnelis® formwork helps to contain plasticisers and water-soluble chemicals which occur in the concrete. Magnelis® ensures the preservation of natural resources as it uses significantly less zinc than pure zinc coatings. Zinc runoff is also reduced dramatically compared to galvanised steels.
“Magnelis® is not well known in Australia and we are one of the only companies utilising it,” notes Logan Mullaney. “But ‘Made in Europe’ is a quality label for Australian companies. Together with the fact that ArcelorMittal is the largest steelmaker in the world, this gives our customers – and bridge users – confidence in the system.”
Magnelis® in the formwork of the InQuik bridge system
The components of the bridge are prefabricated in the factory to reduce disruption on-site
For a small bridge, the deck trays and abutments can be transported in a single semi-trailer load
Once on-site, components can be lifted into place with a crane
Once the bridge structure is in place, the concrete is poured – a few days later the bridge is open to traffic
Compared to a conventional reinforced concrete bridge, the InQuik system is up to 90 percent more steel-intensive. However, the bridges are more cost-effective as they can be prefabricated and installation time is significantly lower explains Logan Mullaney: “InQuik bridges are standardised, pre-certified, and can be mass-produced. And it is possible to transport an entire bridge on one semi-trailer. You just back the truck up to the site, install the components, and then fill them with concrete. Customers typically save between 20 and 50 percent compared to a conventional bridge due to the lower installation time and work, low risk, and less cranage.”