The Walthers Cornerstone Double Track Swing Bridge is based on  prototypes built to cross broad rivers, busy harbor entrances and other  navigable bodies of water. In use from the 1900s to the present, this  model has sufficient clearance for use with virtually any loco or cars,  as well as modern double-stack equipment.  

Like the  prototypes, the model is designed to be turned 90 degrees by hand in a  single direction. A final drive gear and micro switches are provided to  convert the model into a powered bridge with the Universal Gearbox and  Motor Drive Kit 933-1050, sold separately. This unit is fully assembled  and designed for drop-in mounting with the bridge kit.  

This  model also matches the track spacing of Cornerstone double-track  bridges, so several could be used to model approach bridges. (Typically, only one moving bridge is used in prototype situations). Double-track  abutments and wing walls can also be used to detail the approach bridges and make the scene more realistic.  

To prevent derailments  on the span, bridges are fitted with special track sections, equipped  with an inside guardrail. This detail can easily be added to your model  with Walthers Code 83 Bridge Track (948-899 with "V" end guard rails  used at each end of the bridge; for a longer span with approach bridges, 948-886 with no end guard rails can be used), which features code 70  inside rails. As shown, the Double Track Swing Bridge measures: 27 x  6-3/8 x 7-9/16"  69 x 16.2 x 19.3cm

•  
• Part of the Cornerstone Engineered Bridge System
•  
• Detailed deck
•  
• Realistic trusswork
•  
• Similar designs still in use today
•  
• Clearance for tall double-stack intermodal and similar cars
•  
• Fits popular modeling eras
•  
• Molded in appropriate colors
•  
• Motorize with Universal Gearbox and Motor Drive Kit 933-1050, sold separately 
•  
• Use with Walthers Code 83 Bridge Track (948-886 or 948-899 both sold  separately) plus flexible, sectional and hand-laid track or your own  rail
•