Here is a picture of what we suggest click to make larger:
Important STUFF about overhanging countertops:
Corbels are not intended to support heavy weights.
Wood Corbels and can support some weight like a small shelf with glass.
Architectural Polymer Corbels have the consistency of White Pine.
Plaster Corbel are very fragile
Corbels are often used as decorative items that support the overhanging granite countertops.
This is not a good use of a corbel as the granite is very heavy and people inevitably will sit on the countertops from time to time.
We recommend the following for Granite Countertops that overhang:
1) Have your kitchen company install 3/4" plywood on the top of the lower cabinet
everywhere the granite will be, thus under the granite. This adds greatly to the support of the granite.
2) A 1-1/2" overhang bullnose or build-up on the front of the granite should cover the 3/4" ply
3) You now have a place to screw the steel bracket
a) into the plywood b) into the face gable of the front of the lower cabinet.
4) You can also embed the steel bracket into the lower cabinet gable and cover it with a finished face gable or filler
5) Now rout out the pattern of the bracket on the back of the corbel and glue, pin or screw it in place.
The above message is intended only as a suggestion for the betterment and safety of using heavy granite countertops. Remember Granite is stone
and can break under variable conditions and is effected by heat/cold variances. Always use a professional for installation.