ACI Anchorage section is Appendix D - but I don't know if it has shear key design in it.

Thanks JAE,  I know all about Appendix D and there is not anything about shear key design in there.  I guess I meant is there anything in another section that I am missing or maybe in the new ACI-05 code.

AISC has a Design Guide #1 for Base Plates.I think you can download the pdf for free. It specifically designs for Shear Lugs or Keys welded on the bottom of the Plate. Good Luck

ACI 349-01 section B.11.2 describes breifly how to design for a shear lug bearing toward a free edge.

The design shear strength is 4 phi sqrt f'c acting upon the projected effective area.  Phi=0.85

The old ACI 349-85 explains the method more clearly as it similar to the the old method of determining anchor bolt pullout. The reprint is still available from ACI for about $15.00, however the anchor bolt design method has been replaced by the CCD method described in Appendix D of ACI 318-02
 
The old method is also explained fairly clearly in AISC desing guide #7 and is available as a free download for AISC members.

Regards to all,


JPJ

Here are the web links to find these articles:

AISC

http://www.aisc.org/CustomSource/Epub/epubs_home.htm
Go to design guides.


ACI

http://www.concrete.org/PUBS/JOURNALS/ABSTRACTSEARCH.ASP
Search for
Guide to the Design of Anchor Bolts Other Steel Embedments


Regards,


JPJ

Thanks to everyone for there replies.  I went back to the AISC method as I had used before.  It turns out that since the columns are sitting directly on the mat foundation, the engineer who is stamping the design wanted me to put some rebar around the shear tab to ensure confinment of the concrete.  It turned out what he was wanting me to look at was chapter 21 and its discussion of concrete confinement and not shear tab design.  Thanks for the help though guys.