Specifications 
  1 Easy assembled 
  2 Fast installing 
  3 Light transportation 
  4 Factory provide directly 
  5 Good interchangeability 
  
 
  Bailey Bridge requires no special tools or heavy equipment for construction, the bridge elements are small enough to be carried in , and the bridge is strong enough to carry . It is considered a great example of military engineering. 
  http://www.jsbaileybridge.com