I am in the process of building a Maple countertop to butt against an existing granite countertop. The finished thickness will be 1-1/8" to match the existing granite. The overall width will be 39", which will leave about 13-1/4" overhang. The overall finished length of the countertop will be around 100". My question is, will I need to support the overhang? And if so, how?