BUILDING BIG Bridge basics
Bridge Basics
Tuesdays in October on PBS (check local listings) _  
Forces that act on a Truss Bridge.


Truss Bridge: Forces
Every bar in this cantilever bridge experiences either a pushing or pulling force. The bars rarely bend. This is why cantilever bridges can span farther than beam bridges.


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_There's even more to explore at the BUILDING BIG web site, check it out at www.pbs.org/buildingbig.



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