Drive Systems Traction Drive Cable Drive Rack-and-Pinion Drive Jackscrew Drive Belt Drive Stress Release Systems Four-Bar Linkage Hinge Bearing Linear Bearing Independent Suspension Linkage Suspension Control Systems Local Control Computer Control

The long transporters at Minute Maid Park have multiple wheels that must at all times stay engaged with the rail while supporting the weight of the roof panels. Independent suspension allows each wheel to move up and down as needed to accommodate vertical changes in the rail without becoming overloaded or underloaded. While the transporters run on a relatively flat rail track, deviations due to thermal expansion, load distribution or elevation imperfections could adversely affect traction. The independently suspended wheels distribute the load of the roof regardless of construction deviations or environmental conditions. This relatively even distribution of roof loads allow for the most cost efficient design of these building elements and result in significant construction cost savings.