Main Street Bridge (Columbus, Ohio)

[4] In the 1930s, it was replaced with a multiple-span, art-deco open-spandrel concrete deck arch bridge, built in 1937.

After years of degradation due to weather and traffic, the bridge was deemed unfit for use and closed in 2002.

Initially, the bridge called for a very shallow 10:1 span-to-rise ratio for the main arch, creating significant axial and bending forces.

To accommodate the excess forces, the design called for expensive, high-strength concrete and steel to support the bridge.

This design change was expected to allow for cheaper materials and save over 60,000 pounds (27,000 kg) of steel while keeping the ten-degree incline that makes the bridge unique.

This design proved to be nearly impossible to make structurally sound forcing engineers to simplify the piers.

1937 bridge in foreground
Side view of the bridge looking toward Columbus