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How much granite overhang without support is OK?

15 years ago

I'm going to have a an island which will be 30X42 inches. I would like to leave about 1/4 of the area without cabinets underneath so as to have room for a stool.

So there will be be a 15 X 27 inch space there - 15 inches on the 30 inch side, and 27 inches on the 42 inch length will be open. I would like to leave it completely open, but my KD says that I should get a full 30 inch panel (on the shorter side) to support the granite - that it's too large an area to be unsupported.

I see lots of overhangs that seem to run all the way along the length of an island that are open on either end.

Any opinions?

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