For designs where your countertop is cantilevered or overhangs the supports overhanging portion should be limited 16 to 24.
Under granite corbels should match cabinet.
No way should 15 of granite be unsupported.
You can find them on amazon or at your local hardware store and they are pretty inexpensive.
Corbels posts and steel brackets.
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I wasn t home when this was done but i m 99 sure corbels went on before roughtop.
You have three basic options to support your granite.
Choose a corbel that is 1 2 less than your.
Use granite countertop brackets when overhanging stone counters.
The corbels are pre sanded making them easy to finish with a wood stain paint or faux finish to match your room decor.
Either corbel side is easily mounted to the wall with the metal keyhole plate.
My island is 100 l contractor put roughtop down cut to shape before fabricator templated countertop.
It is bow shaped w 7 overhang on ends 12 in center.
These corbels may be used on either side by simply moving the metal keyhole plate to the other side.
I have 2 corbels under the 12 section.
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If using 3 4 inch thick granite with plywood subtops you should also be fine without adding additional support.
Fragile stones may require corbels and supports that are spaced closer together and that do not allow as much overhang than the specifications here.