[joeavaerage]

Hi,
I have compared 32mm steel to granite. The test piece is 400mm x 200 mm, cantilevered with a 100N vertical force.

Steel deflected by 0.0178mm whereas a 50mm thick granite plate deflected by 0.0184mm, so very very similar. A 75mm granite plate however deflected by 0.0056mm, so about one third the
deflection of either 50mm granite or 32mm steel.

Simply put if your proposed granite plate is 50mm thick it will match 32mm steel but exceed steel if greater than 50mm.

Craig