# Circular Economy 4.1B - IDM Sustainable Infrastructure Guidelines
# Applies to
Large (60-249 lots) and very large (250+ lots) subdivisions
# Objective
# Summary
Better Practice is awarded where lower upfront carbon materials and construction methods are identified and demonstrated using the Infrastructure Design Manual Sustainable Infrastructure Guidelines. Small and medium subdivisions must submit the Sustainable Infrastructure Project Template informed by the carbon calculator. This includes low-carbon choices for construction methodology, asphalt, concrete, aggregates, bedding sands, and pipe/conduit.
Examples include minimising earthworks, using recycled content in asphalt and concrete, and selecting pipes laid on recycled glass sand or made from recycled PVC or HDPE.
Note that this standard and 4.1A are the same standard. Achievement of this standard is considered Better Practice for large & very large subdivisions, and Excellence for small and medium subdivisions.
# Documentation & evidence required
- Engineering Plans (Detailed Design): Submission of Infrastructure Design Manual (IDM) Sustainable Infrastructure Guidelines template
# Further Information
- IDM Sustainable Infrastructure Guidelines: https://www.designmanual.com.au/download-idm