Concrete structures
Engineering design of reinforced and prestressed concrete.
Overview
AS 3600 is the design standard for concrete structures. It covers strength, durability, fire resistance and serviceability of reinforced and prestressed concrete. Used by engineers for any concrete element that isn't covered by the AS 2870 standard tables.
Key Requirements
- Design concrete strength (typically 20–40 MPa for residential).
- Cover to reinforcement for durability (exposure class A1–C2).
- Reinforcement detailing and lap lengths.
- Crack control.
How it's used in the NCC
Called up where engineered concrete is required — basement walls, retaining walls, suspended slabs.
Practical Notes
- Cover to reinforcement is the most common spec issue — coastal exposure needs more cover than inland.
- Concrete strength is specified at 28 days — don't load early concrete prematurely.
Where to obtain
The full text of AS 3600 is published by Standards Australia and must be purchased — typical price A$150–400 per part. Always work from the current edition referenced in the NCC, not an older one.