Maximum Overhang For Granite Countertop

According to the marble institute of america you can safely overhang granite that is 1 inches thick up to 10 inches without support.

Maximum overhang for granite countertop.

The corbels must be designed to support the weight of the countertop and be mounted to studs. Of overhang for 42 quot. So to clarify the maximum overhang is the lesser of 2 3rd or 12 inches. Most granite fabricators will recommend support brackets on overhangs over 12 however solely based on the overhang amount.

You can go with a normal granite up to 7 if you have like ceaserstone ore silestone you can go with one inch more but in your 25 overhang you need at least 20 brackets and your overhang will not be fully used because more than 15 is useless. Final determination on bracket requirements and spacing should be recommended by your fabricator. So we are ok on the first criteria but we exceed the 1 3 criteria by four inches. Once your countertop overhang exceeds these numbers it will require additional support through corbels base cabinets or knee walls.

You can see that in all cases the recommended. According to the marble institute of america you can safely overhang granite that is 1 1 4 thick up to 10 without supports. However the cantilevered portion cannot be more than 1 3 the total width of the countertop. Can you extend the overhang on a kitchen island countertop.

High counter seating and 18 quot. The allowable overhang with no additional support is no more than 1 3 of the depth of the countertop and not to exceed 15 total. Without any additional support solid surface countertop overhangs cannot exceed 6 engineered stone cannot exceed 14 and granite overhangs shouldn t be more than 10 without additional supports. Corbels can support no more than 24 of the overhang.

The standard overhang for granite countertops is 1 inches 12 inches for an island just like the standards in general. If you only have 6 inches of stone on top of a wall cap then the maximum safe overhang is 2 inches following the 2 3rds rule. However you may need to install supports such as corbels or legs. Nkba standards recommend 12 quot.

However the cantilevered portion cannot be more than one third the total width of the countertop. Overhangs greater than 15 require the installation of corbels. Yes you can extend the overhang on a kitchen island countertop.