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Re: Corbels

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PCA has published a booklet based on AASHTO Standars.
The authors of the booklet are Professors Collins & Mitchell and Dr. Rabbat.
They cover four examples and one of the case is Corbels.

>>> gtg740p(--nospam--at) 08/10/06 2:41 PM >>>
I looked in an old AASHTO I have and it says the same as ACI does about the
horizontal loop. Are you sure you are looking at the front face anchorage
equirements in the AASHTO?


On 8/10/06, M. David Finley, P.E., P.A. <davidfinley(--nospam--at)> wrote:
>  Regarding the primary tension reinforcement in corbels,
> ACI 318-02, 11.9.6 prvoides requirements for anchoring the primary tension
> reinforcement.  Item (b) states "By bending primary tension bars As back to
> form a *horizontal* loop"
> The AASHTO LRFD Bridge Design Specifications (3rd Edition) says
> in the commentary that the anchorage for developing reinforcement may
> include:  "Bending the primary bars *down* to form a continuous loop"
> The way that I read this is that ACI requires a continuous loop in the
> horizontal plane while AASHTO requires the continuous loop to be in a
> vertical plan.  Am I reading these sections correctly?  Does each method
> offer some advantage over the other?
> FWIW, I need to develop the primary tension reinforcement without welding,
> so the structural weld to a transverse bar is not an option for my
> application.
> TIA,
> David Finley
> M. David Finley, P.E., P.A.
> 2086 SW Main Boulevard - Suite 111
> Lake City, FL  32025
> 386-752-6400

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