trussdbechtold.weebly.com/uploads/2/3/7/5/23753579/truss.pdftruss design since the strength of a...

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Truss Design Since the strength of a beam is determined by it’s depth, the deeper the beam the stronger it is. A solid deep beam is heavy and expensive so one solution is to build it out of sticks. We call this a truss. Since parallelograms are not stable under a load and triangles are, we find that triangular shapes are the best for trusses. The deck of the bridge may be on top of the truss, below the truss or through the truss. Pros * high strength * deck placement * economical * long spans Cons * maintenance $ * precisely engineered

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Page 1: Trussdbechtold.weebly.com/uploads/2/3/7/5/23753579/truss.pdfTruss Design Since the strength of a beam is determined by it’s depth, the deeper the beam the stronger it is. A solid

TrussDesignSincethestrengthofabeamisdeterminedbyit’sdepth,thedeeperthebeamthestrongeritis.Asoliddeepbeamisheavyandexpensivesoonesolutionistobuilditoutofsticks.Wecallthisatruss.Sinceparallelogramsarenotstableunderaloadandtrianglesare,wefindthattriangularshapesarethebestfortrusses.Thedeckofthebridgemaybeontopofthetruss,belowthetrussorthroughthetruss.

Pros*highstrength *deckplacement*economical *longspans

Cons*maintenance$ *preciselyengineered

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