A Railway Swing Bridge Is A Movable Bridge That Has As Its Primary Structural Su ...
Stockphoto ID: 2422876
File name: DSC_5601.jpg
Format: digital, 3000+ pixels longest side
Property release: no Model release: no
Source: photographer Based in: United States
Description: A railway swing bridge is a movable bridge that has as its primary structural support a vertical locating pin and support ring at or near to its center , about which the turning span can then pivot horizontally .