thanks crossframe. It's funny that you suggest using a rr flatcar. The existing structure that has deteriorated after 30 years of service is a rr flatcar body. That option is already being considered.
I need to replace a deteriorated, single-lane, 45'span bridge used by coal trucks. Replacement needs to be completed quickly to minimize traffic interruption. What is the best choice considering project cost and down-time? I was considering pre-cast/pre-stressed concrete. Any suggested...