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Re: Truck Impact Load on the Wall

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Around a year ago, IIRC, ENR reported that an errant truck had knocked a large concrete supporting column out from below an overpass on a Texas freeway.  No protective measures whatsoever!  Surprised the heck out of me; I would have thought that such critical members would be either protected or have the strength to survive such predictible impacts.  I wonder if the AASHTO requirements you mention have "always" been in effect.

Ralph Hueston Kratz, S.E.
Richmond CA

In a message dated 6/14/08 2:21:09 PM, jake.watson1(--nospam--at) writes:
Sorry, I'm a little late and hope this is still useful.  The AASHTO bridge code as several (6 I believe) impact levels based on the geometry of the road and speed of the vehicle.  AASHTO's impact forces can be quite severe and can exceed 100k in some of the worst cases.  I suggest you dig into those provisions.

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