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The National Construction Code (NCC) has two main volumes: Volume 1 for multi-residential and commercial buildings, and Volume 2 for houses and smaller structures. AS 3959 details construction requirements for buildings in bushfire-prone areas, specifying how to withstand embers, radiant heat, and flames based on the Bushfire Attack Level (BAL).
AS/NZS 1170.2 provides the standard for calculating wind loads, with design wind speeds varying by region and classification. Condensation management clauses are located in Part F8 of NCC Volume 1 and Part H4 of Volume 2, with specific requirements found in the Performance Requirements, Deemed-To-Satisfy Provisions, and Verification Methods outlined in each.
NCC Volumes 1 & 2
- NCC Volume One: Governs the design and construction of most commercial, industrial, public assembly, and multi-residential buildings.
- NCC Volume Two: Governs the design and construction of houses, sheds, carports, and other smaller, domestic-scale buildings.
- Structure: Both volumes include Governing Requirements and Performance Requirements, which can be met through various compliance options, such as Deemed-to-Satisfy (DTS) provisions or performance solutions.
AS 3959 (Construction in bushfire-prone areas)
- Purpose: Specifies construction requirements to protect buildings and their occupants from bushfire attack from embers, radiant heat, and flame contact.
- Bushfire Attack Level (BAL): The standard classifies buildings into different BAL ratings based on the level of risk, which then determines the specific construction requirements.
- Requirements: Includes measures like specific construction materials and methods for elements like roofs, walls, and external surfaces to improve resistance to bushfire attack.
AS/NZS 1170.2 (Wind)
- Purpose: Provides the methodology for determining the design wind loads on buildings and structures.
- Key factors: Considers factors such as wind region, building height, and other site-specific conditions to calculate design wind pressures.
- Classification: Buildings are classified as either non-cyclonic (N) or cyclonic (C) based on their location and the corresponding wind loads, which can influence structural requirements.
Condensation clauses
- Location:
- Volume One: Located in Part F8.
- Volume Two: Located in Part H4.
- Provisions: Both volumes contain a Performance Requirement, Deemed-To-Satisfy (DTS) Provisions, and Verification Methods for condensation management.
- DTS provisions (Volume Two): For NCC 2022, the specific Deemed-to-Satisfy requirements are now found in Part 10.8 of the ABCB Housing Provisions Standard.