StrucLab
| Project | — | Job No. | — |
| Calculation | Concrete Cover for Corrosion Protection | By | — |
| Reference | AS 3600:2018 Cl 4.10.3 | Date | 6 June 2026 |
Concrete Cover & Exposure
AS 3600:2018 Cl 4.10.3 · Required cover for corrosion protection by exposure classification and grade
Moderate — interior exposed / exterior inland, non-aggressive
Required cover30 mm
B1 · 40 MPa| Table cover (corrosion) | 30 mm | Table 4.10.3.2 |
| Required cover | 30 mm | corrosion protection governing |
Note: cover must also satisfy fire requirements (Section 5) and be ≥ the bar diameter / aggregate-related minimums (Cl 4.10.2). The governing cover is the greatest of all applicable requirements.
Table 4.10.3.2 — standard formwork
Required cover (mm). Bracket = concession value (Cl 4.3.2); — = grade not permitted.
| Class | 20 MPa | 25 MPa | 32 MPa | 40 MPa | 50+ MPa |
|---|---|---|---|---|---|
| A1 | 20 | 20 | 20 | 20 | 20 |
| A2 | (50) | 30 | 25 | 20 | 20 |
| B1 | — | (60) | 40 | 30 | 25 |
| B2 | — | — | (65) | 45 | 35 |
| C1 | — | — | — | (70) | 50 |
| C2 | — | — | — | — | 65 |