Sustainability
Steel is a low cost material with high tensile strength, which is why you can find it in just about every bridge you cross. Steel girders, cables, and rebar have become the standard building blocks of bridges over the last 70 years. Bridges made with steel turn into bridges made with rust, and bridges made with rust become structurally deficient very quickly. As stated above, there is already $123 billion worth of backlog work for bridge rehabilitation to mitigate structural deficiency. This cost does not account for any costs related to replacing these bridges in the near future. It is time for a more sustainable bridge option.
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