The Building Code of Australia (BCA) is a comprehensive set of regulations governing the design and construction of buildings in Australia, including commercial construction . It is a national set of technical requirements for the design, construction, and performance of buildings .

In the context of commercial construction in Australia, a bead refers to a type of sealant or filler used to fill gaps and joints in building elements, such as walls, windows, and doors. The purpose of a bead is to provide a weather-tight seal, prevent air leakage, and ensure the structural integrity of the building.

a structural member transversely carrying a load. Sometimes called a "girder," these are often used in open plan homes.

beam and joist arrangements can form a supporting frame for a floor. Beams are thicker and longer and are laid vertically; joists are typically shorter and lay across the beams to give them horizontal support.

In the context of commercial construction in Australia, a bearer refers to a horizontal structural member that supports the floor or roof joists and transfers the weight of the floor or roof to the foundation or supporting walls .

A fixed point of reference, the elevation of which is known and referred to during levelling operations.

A notch cut out of roof rafters to secure a firm bearing on top plates.

when material is installed into a wall for additional support for hang items such as handrails and towel rails.

Pattern for laying bricks so that none of the perpends are in line in adjacent courses.

Three rods with tee heads used to sight a straight line between two given points. Boning rods are a type of surveying tool used in commercial construction in Australia to set out levels on paving, drainage, and hard landscaping projects . They consist of a set of rods with graduated markings, used to measure and establish the correct levels and gradients on a construction site.

Diameter of centre hole in circular saw blade.

Several species of insects and larvae that tunnel into timber.

Deformation of timber at right angles to its face.

In Australia, a box gutter is defined as "a graded channel, usually rectangular in shape, used to collect and convey rainwater from a roof to a downpipe or a drainage system" . Box gutters are an essential part of the roof drainage system in commercial construction, allowing for the efficient collection and disposal of rainwater.

In the context of commercial construction in Australia, bracing refers to the structural elements or systems used to resist lateral loads, such as wind and seismic forces, and provide stability to a building . Bracing is an essential component of a building's structural system, ensuring that the structure can transfer loads to the ground with an adequate safety margin to prevent collapse.