It can be, but it's tensile strength is ranked 3rd on product found in the home. Behind Steel and close to Concrete. I do, however, know first hand how brittle it can be (not a good story), but from the photos it looks like there is a very small overhang. Is your concern that it might crack in the center of the cabinet? That seems very unlikely to me. The counter top is designed and "normally" used to carry a dead load. I wouldn't write this up.