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yes they have truss for getting more strenth to the bridge........
A truss system is an aggregation of floor and roof trusses or steel support beams that is in a shape of a triangle. External forces are considered to act only at the nodes. All the joints in a truss are considered as revolutes.
It is very hard because it is the strongest.
Truss
It uses a K-truss style that is rarely used outside of the Great Plains.
They are made from tool steel with a hardened tip.
One disadvantage of using a one pipe heating system is that what?
truss
As far as i can tell there are 27 different types of truss bridges (i.e. Brown truss, Bowstring truss, Kingpost truss, Long truss, and Pratt truss). Hope this helps :D
A truss bridges are designed using materials that are connected in a manner to be stressed under tension and/or compression. I truss system can be designed to be as long as necessary. Columns are also used in truss desins to reduce deflections.
a truss
the truss