135’-0” double wide through plate girder (DWTPG) span for UPRR Bridge 286.55, Boone Sub in Denison, IA
Tractor trailers will be used to haul the 27 loads of steel to the job site. The common girder will have to be laid flat because the center of gravity is too high if shipped vertically. The tractor trailer being used for the common girder (see below) has 11 axel locations with 2 axels per location (see end view). Each axle has 4 tires time 22 equals 88 tires for the trailer alone. Each axle is separate from each other and can be steered independently. A “push tractor” will be attached to the end of the trailer to help the load over hills etc. Front to end the entire load is roughly 192’-0 in length.
Once the steel is onsite the spans first phase will be built alongside the existing span. after it’s fully erected it will be slid into position with the use of hydraulic pistons and a series of rollers. It will take 4 weeks to assemble phase one steel and ready it for train traffic.