NCC 2019 Volume Two Amendment 1
Search the National Construction Code editions
Classification
Building class 1a Building class 1b Building class 2 Building class 3 Building class 4 Building class 5 Building class 6 Building class 7a Building class 7b Building class 8 Building class 9a Building class 9b Building class 9c Building class 10a Building class 10b Building class 10c

Filter

Classification
Building class 1a Building class 1b Building class 2 Building class 3 Building class 4 Building class 5 Building class 6 Building class 7a Building class 7b Building class 8 Building class 9a Building class 9b Building class 9c Building class 10a Building class 10b Building class 10c
Part 3.3.6 Isolated masonry piers

Part 3.3.6 Isolated masonry piers

Appropriate Performance Requirements

Appropriate Performance Requirements

Where an alternative isolated masonry pier system is proposed as a Performance Solution to that described in Part 3.3.6, that proposal must comply with—

  1. Performance RequirementP2.1.1; and
  2. the relevant Performance Requirements determined in accordance with A2.2(3) and A2.4(3) as applicable..

Acceptable Construction Manuals

3.3.6.0

Performance RequirementP2.1.1 is satisfied for an isolated masonry pier system if it is designed and constructed in accordance with one of the following, as appropriate:

(a)

AS 3700, except—

(i)

'(for piers—isolated or engaged)' is removed from Clause 8.5.1(d); and

(ii)

where Clause 8.5.1 requires design as for unreinforced masonry in accordance with Section 7, the member must also be designed as unreinforced masonry in accordance with Tables 10.3 and 4.1(a)(i)(C) of AS 3700.

(b)

AS 4773.1 and AS 4773.2.

Acceptable Construction Practice

3.3.6.1 Application

Compliance with this acceptable construction practice satisfies Performance Requirement P2.1.1 for an isolated masonry pier system provided—

(a)

the building is located in an area with a design wind speed of not more than N3; and

(b)

isolated piers are constructed on footings that comply with Part 3.2; and

(c)

masonry units comply with 3.3.5.3(c) and have a minimum compressive strength of—

(i)

6.2 MPa for solid or cored units; or

(ii)

15 MPa for hollow units; and

(d)

the roof structure and any walls provide the required lateral bracing for the top of the isolated pier when determined in accordance with AS 3700, except—

(i)

'(for piers—isolated or engaged)' is removed from Clause 8.5.1(d); and

(ii)

where Clause 8.5.1 requires design as for unreinforced masonry in accordance with Section 7, the member must also be designed as unreinforced masonry in accordance with Tables 10.3 and 4.1(a)(i)(C) of AS 3700; and

(e)

the building site soil classification is either A, S or M; and

(f)

the building is not constructed in an alpine area; and

(g)

the building is one for which Appendix A of AS 1170.4 contains no specific earthquake design requirements.

3.3.6.2 Piers supporting carports, verandahs, porches and similar roof structures

Isolated piers supporting carports, verandahs, porches and similar roof structures, or vehicle access door openings, which form part of the main roof, or are attached to a wall of a Class 1 building must—

(a)

be not less than 290 x 290 mm in section; and

(b)

be not more than 2.7 m high (see Figure 3.3.6.1); and

(c)

be spaced at not more than 3 m centres (see Figure 3.3.6.1); and

(d)

provide a bearing length of not less than 150 mm for any supported members; and

(e)

comply with the relevant provisions of this Part.

3.3.6.3 Piers supporting tiled roofs

Isolated piers supporting tiled roofs must have—

(a)

a built-in 32 x 0.8 mm galvanised steel strap fixed to the roof structure that extends the full height of the pier; and

(b)

a 4.6 grade M12 galvanised steel rod which is cast into the footing when poured and looped and fixed around the galvanised steel strap required by (a).

3.3.6.4 Piers supporting sheet roofs

Isolated piers supporting sheet roofs must have—

(a)

a built-in 32 x 0.8 mm galvanised steel strap fixed to the roof structure extending the full height of the pier which is looped and fixed around a 4.6 grade 16 mm diameter galvanised steel rod cast into the footing when poured; or

(b)

a 4.6 grade M16 galvanised steel rod cast into the footing, threaded at the top and extending the full height of the pier to connect to the roof structure.

3.3.6.5 Piers for freestanding carports

Piers for freestanding carports must—

(a)

be not less than 290 x 290 mm with the central core filled with 20 MPa concrete, or an exposure class mortar (see Table 3.3.5.2) complying with 3.3.5.4; and

(b)

have the core reinforced with one Y16 steel reinforcing rod cast into the footing and extending the full height of the pier to connect to the roof structure.

Figure 3.3.6.1 Piers under main roof
v2_Fig3361_2019.svg

3.3.6.6 Subfloor piers

(a)

Subfloor isolated piers must be a minimum of 190 x 190 mm in section and comply with Figure 3.3.6.2 for height requirements.

Figure 3.3.6.2 Sub-floor isolated piers - maximum height and sectional details
v2_Fig3362_2019.svg