Alternative compliance pathways that demonstrate a building meets the requirements of the National Construction Code (NCC) without strictly following the Deemed-to-Satisfy (DTS) provisions. Performance Solutions allow for flexibility and innovation in design, including the use of timber in complex or non-standard applications. They must be supported by evidence—such as expert judgment, modelling, or testing—to prove they achieve the relevant Performance Requirements of the NCC.

The ability of a building material or construction system to resist ignition, fire spread, and structural damage during a bushfire event. In timber construction, bushfire performance is assessed based on compliance with Australian Standard AS 3959: Construction of buildings in bushfire-prone areas, which assigns Bushfire Attack Levels (BALs). Timber products must meet specific requirements for flame resistance, ember protection, and radiant heat exposure to be used safely in designated BAL zones.

The visual and sensory qualities of a material or structure that contribute to its overall attractiveness and design harmony. In timber construction, aesthetic appeal refers to the natural beauty, warmth, grain patterns, colour, and texture of wood, which can enhance both interior and exterior environments. It plays a key role in architectural design, influencing material selection and user experience.

The ability of a building material or construction system to control and reduce sound transmission. In timber construction, acoustic performance refers to how effectively the structure isolates airborne and impact noise between spaces, contributing to occupant comfort and compliance with building standards. Key factors influencing acoustic performance include material density, panel thickness, insulation, junction detailing, and floor/ceiling system design.

Set that occurs during tension, which tends to increase the dimensions of the wood after drying. Tension set usually occurs in the outer layers of wood during drying.

A temporary assembly tool or fixture made up of guides and supports that helps maintain correct stick alignment, square sides, and plumb ends during the construction of timber racks or frames.

The wet-bulb temperature is measured using a thermometer whose bulb is wrapped in a water-saturated cloth (called a wick). It reflects the cooling effect of evaporation. It is always lower than or equal to the dry-bulb temperature and it indicates the humidity level: the more moisture in the air, the closer WBT is to DBT. Wet-bulb temperature is important in kiln drying, as it helps determine how fast timber can safely lose moisture

The dry-bulb temperature is the actual air temperature, measured by a standard thermometer exposed to the air but shielded from radiation and moisture.