| Dimensional parameters | | Bilbao (Roman) |
| Nominal dimensions (mm) | 240 x 40 x 110 |
| Dimensional variation (mm) | +- 4mm / +- 2mm / +- 3mm |
| Weight per brick (kg) | 2 |
| Bricks per pack | 500 |
| Weight per pack (kg) | 1000 |
| Bricks per m2 | 72 |
| Voids (%) | N/A |
| Performance parameters | | |
| Unconfined characteristic compressive strength (f' uc ) (MPa) | ≥ 35 |
| Cold water absorption (%) | ≤ 6 |
| Initial rate of absorption (kg/m2 min) | ≤ 1.25 |
| Potential for efflorescence | Nil |
| Durability class | EXP |
