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What are the advantages of having corrugation in crash barriers?

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The layout of corrugated beam barriers is that the beams are corrugated in the longitudinal direction so that it provides higher lateral stiffness with a thinner material. Moreover, the distance of beams posts and crashing vehicles are considerably increased.

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In case the beam barriers are tensioned, it is intended to create a stiff beam erected on relatively weak posts. During vehicle collision, the posts would be separated from the beams and there would be lesser deceleration experienced by the vehicles.

beam-barrier

This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.

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