As an active member of the Heavy Engineering Research Association's Bridge Development Group Steltech believe that using steel in concert with concrete represents the most efficient soluiotn for many bridging applications.
Steel is light weight and has a large spanning capability which reduces the super structure weight allowing for lighter concrete foundations. The steel structures are fabricated off site and lifted into place reducing the time on site which lowers costs and reduces site safety risks.
The picture belows shows the Keri Keri Heritage Bridge designed by Richardson Stevens Consultants shows how steel can be used for complex and asthetically pleasing structures.
