This is version 8 of a style of double track bridge used on the Florida East Coast Railroad.
Overall length = 690 ft. This actually represents an existing bridge at Crane Creek. Today one set of rails has been
removed but the deck plate girders and ties for the second track are still there. This can be modeled by
removing the text in the config file for track-2. The attachment points will still be in the mesh so the rail only
track can be replaced if you change your mind.