Version with 3 mounting holes and beveled corners. Dimensions: 40×40cm; Corner size 10cm (beveled corner). Thickness: nominal thickness 4mm. Size tolerance: on length and width +3/-3mm; on thickness +1/-0.4mm. Volume mass 1850kg/m³ (min. 1750). Water absorption 15%. Fracture bending stress: parallel to the fibres 16N/mm², perpendicular to the fibers 25N/mm², average bending moment 55Nm/m. Hygric expansion coefficient 3.3mm/m. Thermal expansion coefficient 10⁻⁶m/mK.