I'm building a kitchen island, 66" x 114", 3 cm granite and have never done this kind of work before.
I need help on how to support the end, which will be used as a table.
Approx 40" x 66" will overhang. There are 72" of cabinets up to the overhang. On the far end are a sink and dishwasher.
My wife would like to not use legs for support and I'd like to not use corbels either.
So, I'm thinking of cantilevering some square tubing over the length of the cabinets and almost to the edge of the overhang, spaced at about 18". Then using some metal plate, 1/4" or 3/8", (48" x 90") under the entire slab, attaching it to the tubing (either weld or screws) and filling in around it with plywood. Then covering with some trim under the granite edges.
Anyone think this will work? have a better way?
My husband is a granite fabricator for 15 yrs. Anything over 20" you should use legs or stiffknee; corbels would not support more than 24". A 12" corbel or L bracket would not support more than 24"