Strength classes of concrete in Eurocode 2
Concrete » Strength classes of concrete in Eurocode 2
| Class | fck (N/mm2) | Normal lowest class for use as specified |
| C16/20 | 16 | Plain concrete |
| C20/25 | 20 | Reinforced concrete |
| C25/30 | 25 | Prestressed concrete/Reinforced concrete subject to chlorides |
| C28/35 | 28 | Reinforced concrete in foundations |
| C30/37 | 30 | |
| C32/40 | 32 | |
| C35/45 | 35 | |
| C40/50 | 40 | |
| C45/55 | 45 | |
| C50/60 | 50 | |
| C55/67 | 55 | |
| C60/75 | 60 | |
| C70/85 | 70 | |
| C80/95 | 80 | |
| C90/105 | 90 |
