Concrete Overview Building Codes & Rules
- Concrete Overview Tools™ simplifies the National Construction Code (NCC) with interactive graphics, including deemed to comply & best practices.
Wall Pour Joints
- To comply with AS 3610.1 Formwork for Concrete
- Indented or disguised control & Construction Joints for vertical surfaces
Indented Horizontal Pour Joint
NCC 2022 V2
- Rebate to emphasise Joints
- Use pre-formed Foam Strip on the Joint between Plywood sheets
- Prevents moisture penetration
- Averts Cement Grout leakage
- Use Fibreglass & form liners
- For textured form Joints
- For complex shapes & profiles
- To comply with AS 3610.1 Formwork for Concrete
- Indented or disguised control & Construction Joints for vertical surfaces
Concrete Form Finish Classes
Concrete Curing
Concrete Surface Finish
Footing Slab
Slab Edge Rebate
Stiffened Raft Footing
Waffle Raft Footing
Abrasion
- Hardness of Concrete required to resist Abrasion[1]
Concrete ABRASION
NCC 2022 V2
All Building Classes
NCC 2022 Part 4.2.10 [2019: 3.2.3.1]
May 2023
AS 3600:2018, 4.6
- Concrete must comply with NCC Part 4.2, AS 2870, & AS 3600
- For locations susceptible to abrasion from vehicular traffic, the compressive strength of the Concrete must surpass the values outlined in the table belowAS 3600:2018, 4.6
AS 3600:2018, 4.6
- Hardness of Concrete required to resist AbrasionAS 3600:2018, 4.6
Minimum Cover
- Thickness of Concrete around Steel reinforcement to protect from corrosion[1]
Concrete COVER
NCC 2022 V2
All Building Classes
NCC 2022 4.2.11 [2019 3.2.3.2]
May 2023
AS 3600:2018, 4.10.3.2
AS 3600:2018, 4.3.1 (c)
- Concrete must comply with the NCC
- Cover for standard Formwork & compaction as per tableAS 3600:2018, 4.10.3.2
- Add thickness where cast against ground
- Embedded elements must be protected from corrosion or deteriorationAS 3600:2018, 4.3.1 (c)
AS 3600:2018, 4.3.1 (c)
- Thickness of Concrete around Steel reinforcement to protect from corrosionAS 3600:2018, 4.3.1 (c)
Threshold
Joints
Concrete JOINTS
NCC 2022 V2
All Building Classes
NCC 2022, H1D1 & 4.2.10 [2019 3.2.3.1]
May 2023
AS 3600:2018, 19.1.2
AS 3600:2018, 19.1.3
AS 3600:2018, 19.1.4
- Concrete must comply with NCC Part 4.2, AS 2870, & AS 3600
- Construction JointsAS 3600:2018, 19.1.2
- Allows easier concrete placement & finishing
- Junction between different stages of pours
- These do not allow movement
- Located in areas that are not critical
- Designed based on specific construction practices & Concrete placement requirements
- Placed in areas of low shear force & minimal visibility
- Spacing depends on placement rate, finishing needs, & unexpected suspension
- Movement JointsAS 3600:2018, 19.1.3
- Allows for differential movement throughout the building's life without compromising the overall structure
- Control movement at the Joint & cracking at specific locations
- Spacing is crucial & considers various factors like shrinkage, temperature, & prestress (if applicable)
- Contraction Joints
- Controls cracking due to concrete shrinkage from curing
- Joint Fillers & SealantsAS 3600:2018, 19.1.4
- Fillers inserted compressed, either during concrete placement or after hardening
- Sealants provide additional functionalities
- Weatherproofing
- Acoustic insulation
- Fire resistance
- Preventing material ingress
- Fillers & Sealants can be used in a single Joint
- Designed to prevent dirt or other materials from entering & hindering movement
- Infill materials & Concrete edges need to be strong enough to prevent damage for Joints with anticipated loading
AS 3600:2018, 19.1.3.1 (c)
AS 3600:2018, 19.1.2.1
- Allow for movement in a buildingAS 3600:2018, 19.1.3.1 (c)
- Separate between different poursAS 3600:2018, 19.1.2.1
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