CLAY PAVING CLASSIFICATIONS
All Corobrik clay pavers are manufactured in accordance with the South African National Standard (SANS 1575:2007) for burnt clay paving units. The classification reflects the degree of uniformity in size and shape, and the strength the paver is produced to.
PA
Units that are selected or produced for their durability and for a high degree of uniformity in size and shape, and that have dimensions such that the ratio of work size length to work size width is approximately 1:1, 2:1 or 3:1.
Tolerances in work sizes (Length, Width, Thickness):
Individual Unit: 5mm, 3mm, 3mm
Average Dimensions of 32 units: 2.5mm, 1.5mm, 1.2mm
Average modulus of rupture (does not apply to paving units of length less than 80mm):
Nominal modulus of rupture: 4 MPa
Minimum individual modulus of rupture: 2.5 MPa
PB
Units that are selected or produced for their durability and for their uniformity in size and shape.
Tolerances in work sizes (Length, Width, Thickness):
Individual Unit: 6mm, 4mm, 4mm
Average Dimensions of 32 units: 3mm, 2mm, 2mm
Average modulus of rupture (does not apply to paving units of length less than 80mm):
Nominal modulus of rupture: 3 MPa
Minimum individual modulus of rupture: 2 MPa