Technical Clarification

Clarification of percentage calculations

Technical Clarification Number


The below credit criteria from the PEB v1, MURT v1 & Retail v1 Technical Manuals can be used for Office v1 and Office v1.1 projects:

One point is awarded where:
• For a predominantly structural steel building:
– The average post-consumer recycled content of the structural steel is at least 24% (by mass);
– At least 60% (by mass) of the structural steel, is reused.
• For a predominantly reinforced concrete or structural masonry building;
– The average post-consumer recycled content of the steel reinforcing is at least 54%
(by mass)

An additional two points are awarded where:
• The point above is achieved;
• The total of all applicable steel uses in the development (total of structural steel, steel
reinforcing and applicable steel products) consists of;
– At least 54% (by mass) post-consumer recycled content;
– At least 90% (by mass) reused steel.



Green Star SA – Office v1 Technical Manual: Page 242

Erratum Number


Documentation description, Short Report, fifth bullet point, ‘as well as supplier and contractor evidence of the post-consumer content of the steel used;’ is required in the As Built and not in the Design Short report.


Technical Clarification

Quantity surveyor report and short report

Technical Clarification Number


This Technical Clarification is applicable to Mat-3 Reused Materials, Mat-6 Steel, Mat-7 PVC Minimisation, Mat-8 Sustainable Timber, Mat-9 Design for Disassembly, Mat-10 Dematerialisation and Mat-11 Local Sourcing.
Where the ‘Documentation Requirements’ (for Design and As Built) request a ‘Short report’ and a ‘Quantity Surveyor report’, if the ‘Short report’ is prepared by the Quantity Surveyor, it is permitted that one consolidated report satisfying both ‘Documentation Requirements’ be submitted instead of two separate documents.

Where the ‘Short report’ is not prepared by the Quantity Surveyor (e.g. green building consultant, Accredited Professional, structural engineer etc.), both the ‘Short report’ and ‘Quantity Surveyor report’ must be submitted independently.

The purpose of the ‘Quantity Surveyor report’ is to validate data (e.g. quantities, costs, Project’s contract value etc.) referenced within the ‘Short report’.


Credit Interpretation Request

Extent of steel addressed by credit

Credit Interpretation Request Number


The Mat-6 Steel credit in both the Green Star SA Office v1 rating tool is broken down into two parts with a total of 3 un-weighted points available.

1st Point – Building Structure Steel Applications

The first part (1 point) addresses ‘structural steel’ applications in predominantly steel-framed buildings and ‘reinforcing steel’ applications in buildings predominantly framed in concrete (insitu/precast/stressed). The definition of ‘predominant’ is the framing method which represents the greater steel cost of the total building’s structural cost. The steel applications that are applicable for each structure type include (but are not limited to);

- Steel-framed: hot rolled beams, columns, angles, hollow sections, parallel flange channels, mullions, purlins, girts and light-steel framing systems (i.e. lightweight cold-rolled galvanised steel sections).

- Concrete-framed: reinforcing bar, reinforcing mesh and permanent steel formwork.

For the purpose of demonstrating compliance with the Credit Criteria for this first point, steel applications within the non-predominant framing method are excluded from the calculations. For example, where a building consists of both steel-framed and concrete-framed components (e.g. on different floors or levels) and the steel-framed component is predominant (by cost), then the concrete-framed steel applications (e.g. reinforcing bar/mesh) are neglected from calculations demonstrating compliance with the Credit Criteria.

Additional 2 Points – All ‘Major’ Steel Applications

The second part (2 additional points) addresses ALL ‘major’ steel applications in the building regardless of which framing system is more predominant. The ‘major’ steel applications in a building include;

- Steel-framed structure applications (as above); AND
- Concrete-framed structure applications (as above); AND
- Building envelope applications (e.g. steel wall cladding and steel roof decking).

Please note that it is not the intent of the Credit Criteria to encompass minor miscellaneous steel applications (e.g. door frames, balustrades, railings, fences, UFAD pedestals, architectural features etc.) to be awarded the 2 additional points. Although noted as steel applications within buildings, these are excluded from the scope of the Mat-6 credit due to the general quantity of steel represented and the practicalities of quantification.

Also note that the Mat-6 Steel credit is applicable for base building steel uses as described above. Tenant fit-out steel uses (i.e. steel framed partition walls) are excluded from the scope of the credit.


Technical Clarification

Recycled Content Documentation

Technical Clarification Number


For documenting recycled content of steel in an As Built submission, it is acceptable to provide evidence stating the overall, manufacturer-wide, recycled content for the particular product or products, rather than the specific batch provided to the project.



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