NCC 2016 Volume Two
Part 3.2 Footings and Slabs

Part 3.2 Footings and Slabs

Appropriate Performance Requirements

Appropriate Performance Requirements:

Where an alternative footing system is proposed as a Performance Solution to that described in Part 3.2, that proposal must comply with—

  1. Performance RequirementP2.1.1; and
  2. Performance RequirementP2.2.3; and
  3. the relevant Performance Requirements determined in accordance with 1.0.7.

Explanatory information

Explanatory information:

The requirements of this Part are to be read in conjunction with Part 3.4.1. The Part 3.4.1 subfloor ventilation requirements apply to the subfloor space of all suspended floors of a building or deck, including but not limited to, timber and steel framed subfloors and suspended concrete slabs.

Acceptable construction manuals


Performance RequirementsP2.1.1 and P2.2.3 are satisfied for footings and slabs if they are installed in accordance with one of the following:


The footing or slab is constructed in accordance with AS 2870.


Piled footings are designed in accordance with AS 2159.

Explanatory information

Explanatory information

Composite construction — design requirements for other materials that may be used in combination with the above footing systems, including the use of heavy steel support beams etc are described in Part 3.11 — structural design codes.



In New South Wales delete 3.2.0(a) and insert NSW 3.2.0(a) as follows:


The footing or slab is constructed in accordance with AS 2870 except that for the purposes of Clause of AS 2870 a damp-proofing membrane is required to be provided.

Acceptable Construction Practice

3.2.1 Application

Compliance with the acceptable construction practice contained in Parts 3.2.2 to 3.2.5 satisfies Performance Requirements P2.1.1 and P2.2.3 for footings and slabs, provided—


the footing is on a Class A, S, M, M-D, H or H-D site (classified in accordance with AS 2870) with a uniform bearing capacity; and


the slab is not more than 30 m long; and


slabs containing permanent joints (eg construction joints) are not used; and


the structure supported by the footing does not contain—


more than two trafficable floors; or


a wall height exceeding 8 m, excluding any gable; and


the footing does not support more than one concrete slab; and

Explanatory information

Explanatory Information

For the purpose of (e) split level slabs are considered as one slab.



the building does not include wing walls or masonry arches not detailed for movement inaccordance with Cement Concrete and Aggregates Australia TN 61; and


single leaf earth or stone masonry walls do not exceed 3 m in height; and


the site is considered to be normal as defined in Part 3.1.1; and


the site is not located in an alpine alpine area.