Chausal Company begins with the preparation of the first prismatic specimens (180x30x30mm)
of each of the four selected materials: Carrara Marble, Macael Marble, Moleano Limestone
and Floresta Sandstone. The main problem is associated to the need of the opposite faces being
totally parallel. In this way we would avoid asymmetric loads due to the poor support of the rollers
in the four-point bending tests.