A lightweight and strong solution for open bottom culverts and more.
Made from solid aluminum alloy structural plate, corrosion/abrasion-resistant Dur•A•Span is ideally suited for your saltwater and aggressive soil applications where rustproof culverts or other structures are desired.
Proven in over 15,000 structures internationally
Lightweight and strong, Dur•A•Span has proven itself for over 20 years in more than 15,000 structures internationally. Increasingly, these rustproof culverts are chosen over their precast concrete counterparts on overall performance and cost.
Design service life of over 75 years
That’s because aluminium has a tough, self-healing, oxide surface film that reforms immediately if it is mechanically damaged or corroded in an aggressive environment like saltwater or harsh soils. This makes Dur•A•Span corrosion-resistant culverts virtually maintenance-free, with a design service life of over 75 years.
Open bottom culverts are environmentally friendly
Dur•A•Span aluminum box culverts are usually supplied as open bottom and are an environmentally friendly solution, promoting fish passage through the construction period and beyond. Box culverts are used primarily when height is limited and they can accept low cover heights. They also offer generous clearance boxes and hydraulic flow properties.
With our latest innovations is reinforcing rib technology, Dur•A•Span corrosion resistant culverts can reach spans of more than 12.2 m (40′).
We recommend Dur•A•Span for stream crossings, open bottom culverts, box culverts, culvert pipes, culvert relines and fish passages in saltwater or aggressive soil environments. It is also used in storage structures for road salt or other materials.
Discover the many benefits of Buried Metal Bridges
Structural Plate Bridges or Buried Metal Bridges offer many advantages over concrete equivalents and traditional site-built beam bridges.
Visit our Buried Bridge Benefits page to learn more >>
Bring enhanced aesthetics to your Buried Metal Bridges
From interior finishes and lighting to exterior end treatments and even urban greenways on top, take a look at the full range of possibilities in our Design Ideas Gallery.
Visit our Design Ideas Gallery to learn more >>
12-page, full-colour brochure outlining Dur•A•Span product, applications, specifications and geometries. Introduces new Type X hat rib.Download
Watch crews remove a century-old culvert and replace it with a new Dur•A•Span corrosion resistant culvert, all in a 65-hour work block.Play