Crane Institute of America

Simple Solutions to a Complex Problem

This railroad bridge section would be difficult to replace using a mobile crane on the approaches or in the canyon, but by combining multiple lifting and transporting technologies the job runs smoothly.

A top-running monorail crane is transported on railroad bogies and positioned to span the existing section.  It raises on the bridge structure by hydraulic jacks and hoists the old bridge section. The dual top-running trolleys transport the section and lower it onto waiting bogies where it is moved back so the new section can be moved in and lowered into place.