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IS Materials Calculator GuidelinesISCA is proud to announce the IS Rating Tool Materials Calculator has been updated and new IS Rating Tool Materials Calculator Guidelines for its use have been developed and released (login to download here).

The primary purpose of new IS Rating Tool Materials Calculator Guidelines is to provide guidance for assessors who are preparing evidence and supporting documents as part of their self-assessment submission. The IS Rating Tool Materials Calculator Guidelines development has been undertaken and sponsored by Edge Environment.

ISCA launched the IS Rating Tool Materials Calculator in 2012 and has made the changes in response to industry and user feedback. The updated calculator must be applied to all projects/assets that register to pursue an IS Rating on or after 20 February 2015. Previously registered ratings may choose to continue with the version of the calculator which applied when they registered or use the IS Rating Tool Materials Calculator Version 1.1, but should notify ISCA if they choose the later.

The ISCA Materials Working Group will contribute to the enhancement and further development of the IS Rating Tool Materials Calculator and review the IS Rating Tool Materials Calculator Guidelines.

ISCA recognises the need to stay up to date with the latest developments and data regarding sustainability in infrastructure for the benefit of our members, tool users and the industry. We continuously monitor industry developments and look to update our tools and supporting information when new information or processes become available and in accordance with industry feedback. Major updates will be undertaken every few years and include a full review of the rating tool. Minor updates will be undertaken in between major updates and will occur when new information becomes available and a significant industry benefit is identified.

In addition to providing guidance for assessors who are preparing evidence and supporting documents as part of their self-assessment submission, new IS Rating Tool Materials Calculator Guidelines can also be used to:

  • Provide guidance to other users of the IS Rating Tool Materials Calculator.

  • Provide background information on the development of the IS Rating Tool Materials Calculator.

  • Outline additional guidance to be used in conjunction with the existing guidance in the Technical Manual for the Mat-1 credit.

The IS Rating Tool Materials Calculator Guidelines include:

  • An explanation of the basis for the calculator being lifecycle assessment (LCA)

  • Where the materials environmental impact data comes from and how it is used

  • Instructions on how to use the IS Rating Tool Materials Calculator

  • Questions and Answers

The original materials calculator was developed in 2011 and launched in 2012. The Lifecycle Assessment factors were the best available Australian factors at the time. Some of these factors have been updated in their respective databases and a need to update the calculator was identified. Since 2012 tool users have gained experience with the calculator and have provided ISCA with feedback. This feedback has highlighted some areas for minor improvements and the need for more guidance for users.

The IS Rating Tool Materials Calculator has been updated to Version 1.1. The IS Rating Tool Materials Calculator provides a level playing field assessment tool for the embodied material impacts. The calculator can be used to inform design to use resources more efficiently and select lower impact materials and product options. The update adds and removes some materials, updates some LCA factors and simplifies the scoring algorithm.

Detail IS Rating Tool Materials Calculator Update

Item

Description

Reason

Added concrete grades

Added concrete grades 20MPa, 25MPa, 32MPa, 40MPa and 50MPa with 10%, 20%, 30%, 40%, 50%, 60% and 70% Ordinary Portland Cement (OPC) substitution with Supplementary Cementitious Material (SCM)

These new grades have been asked for by stakeholders as they are commonly used on infrastructure projects. The addition of greater proportions of OPC substitution encourages greater use of recycled materials which has sustainability benefits.

Base Case

Changed references to 'Reference Design' to 'Base Case'

Using the term ‘reference design’ was confusing as many organisations had their own meaning for this term. ‘Base case (design)’ is a more generic and less confusing term.

Backloading

Removed reference to backloading in the instructions.

This is covered in the IS Rating Tool Materials Calculator Guidelines

Updated factors

Updated material and transport GHG and EcoPoint factors.

The original materials calculator was developed in 2011 and launched in 2012. The Lifecycle Assessment factors were the best available Australian factors at the time. Some of these factors have been updated in their respective databases and so it was appropriate to review and update the factors where they had been revised in their original source or where more credible data was now available from another source.

Removed waste section

Removed Waste section

Waste is covered by the Waste category and credits and is therefore accounted for elsewhere within the tool.

Simplified scoring algorithm

Applied updated level achieved algorithm:

  • Level 1: Applied material calculator
  • Level 2: 15-30% EcoPoint reduction
  • Level 3: >30% EcoPoint reduction

Previously the calculator applied different EcoPoint reductions to achieve different levels depending on the infrastructure type. Experience from ratings to date has shown that the infrastructure type plays a less significant role in determining potential reductions and a simpler approach is warranted at least until more data has been collected.

Revised instructions

Revised instructions page.

To match IS Rating Tool Materials Calculator Guidelines.

Formulae and formatting

Corrected sub-component 2 GHG reduction formula on Home page.

Reformatted materials details pages.

Minor changes.

IS Rating Assessors are encouraged to contact ISCA if they have any questions or feedback.

 

 

 

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