What is the Maximum Cantilever Overhang of a Natural Stone over the side of a Cabinet?

QUESTION

We are putting a piece of quartzite on our island which is 102” x 44”. Because the doors are 3/8” from top of cabinets, we would like to not have brackets. Can we support a 15” overhang? If not, what is the maximum? Any input is much appreciated. Thank you.

ANSWER

ANSWER - Industry standards state that for 3/4" (2 cm) thick stone you can cantilever the support 6" and for 1.25" ( 3 cm) stone you can cantilever 10".  But in no case can you cantilevered a portion of the stone that represents more than 1/3 of the width of the countertop.

It is always a good idea to support the cantilevered stone with corbelled supports.

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