SG331

Masonry - Brick & Block Construction

GUIDE NOTE: Refer to Design Guide sections DG/ FABRIC, DG/ STRUCTURE, DG/ MATERIALS AND FINISHES

Title

Compliance Level

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General

Mandatory

As per current NATSPEC except as follows:

1.7 Submissions

Samples

Facework sample panels

GUIDE NOTE: Delete subclause "Facework Sample Panels" nominated in NATSPEC Building Template/Worksection and replace with the following.

Internal face brickwork: Prepare a separate sample of single leaf face brickwork and build in a single gang electrical wall box of the pattern specified in this Contract, in the vertical position and with conduit attached.

Minimum size (face of panel): 1800 x 1200 mm
Footings: 2 courses of 230 mm brickwork.

Incorporation into the works: An approved panel, if suitably located, may be permitted to be incorporated in the works. Otherwise protect any approved sample panel from damage and retain until completion of brickwork, then remove all traces.

Mortar samples

GUIDE NOTE: Add if final selection of mortar colour is to be made on the site from several alternatives

Sample panels: Construct two sample panels, 900 x 900 mm in stretcher bond using different selected shades of mortar.

Footings: 2 Courses of 230 mm brickwork.

Products

Mandatory

As per current NATSPEC except as follows:

2.2 Materials

Masonry units schedule

GUIDE NOTE: Add subclause.

Describe brick types indirectly in terms of quality, texture, etc. excluding brand name or brickyard (project architect to choose brick colours from the nominated range after the issue of the letter of acceptance).

Masonry Units:
Masonry units are not to have a soft surface or to be of a porous nature in areas likely to be subject to graffiti.

Ensure that the specified masonry units are not silicone coated.

Mortar materials

GUIDE NOTE: Delete paragraph “Sand” nominated in NATSPEC, Building Template/Worksection and include the following

Sand: Fine aggregate to AS 2758, Part 1 and AS A123 Clause 1.5. bush sand must not be used (Mandatory).

Premixed Mortar: Do not use.

Retempering of mortar: Prohibited. Discard any mortar that is not used within 90 minutes after adding cement.

GUIDE NOTE: In hot dry climates a shorter interval may be necessary

Execution

Mandatory

As per current NATSPEC except as follows:

3.2 Facework

GUIDE NOTE: Add to subclause “Cleaning” nominated in NATSPEC Building Template/Worksection.

Cleaning

High pressure water cleaning: Permitted only at external facework, excluding glazed facework

3.3 Subfloor Work

Air vent locations

GUIDE NOTE: Add the following to subclause “Air Vent Locations” nominated in NATSPEC Building Template/Worksection.

Install air vents as to AS 3660.1 (clause 2.7.4.5, Ventilation) to provide adequate cross ventilation to the space under suspended ground floors.

3.4 Cavity Work

Cavity wall insulation

GUIDE NOTE: Do not specify urea formaldehyde foam cavity insulation.

3.5 Damp-Proof Courses

GUIDE NOTE: Polyethylene is subject to attack by ultra violet rays and should never be used as a DPC/Flashing. It is also subject to mechanical damage and should not be used to cross cavities where damage may occur in cleaning out mortar droppings.

3.6 Flashings

Flashings material

GUIDE NOTE: Standard bituminous coated aluminium is not to be used as a roof flashing due to the fragile nature of the material. Extra super heavy bituminous coated aluminium flashing (min 0.70mm aluminium thickness) to be used.

3.7 Wall Ties

Type: Unless otherwise specified, Type R4 stainless steel wall ties to AS/NZS 2699.1are to be used in all locations

3.8 Control of Movement

Control joints schedule

Joint code	Joint width		Joint filler
		Primer	Backing rod	Sealant
			Closed cell, resilient, semi-rigid polyethylene bond breaking material recommended by the manufacturer for the location and services conditions

3.17 Termite Shields

GUIDE NOTE: Add the following clause to the NATSPEC Building Template/Worksection

Requirement

Provide as specified in SG / COMMON REQUIREMENTS - TERMITE MANAGEMENT

Selections

Mandatory

As per current NATSPEC.