| Bond |  Pattern for laying bricks so that none of the perpends are in line in adjacent courses. |
| Block out |  when material is installed into a wall for additional support for hang items such as handrails and towel rails. |
| Birdsmouth |  A notch cut out of roof rafters to secure a firm bearing on top plates. |
| Benchmark |  A fixed point of reference, the elevation of which is known and referred to during levelling operations. Synonyms - BM
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| Bearer |  In the context of commercial construction in Australia, a bearer refers to a horizontal structural member that supports the floor |
| Beam and joist floor | beam and joist arrangements can form a supporting frame for a floor. Beams are thicker and longer and are laid |
| Beam |  a structural member transversely carrying a load. Sometimes called a "girder," these are often used in open plan homes. |
| Bead |  In the context of commercial construction in Australia, a bead refers to a type of sealant or filler used to |
| BCA | Synonyms - Building Code of Australia
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| Bay Window |  A bay window in commercial construction in Australia is a straight-sided construction, containing one or more windows, that projects from |
| Batter |  In the context of commercial construction in Australia, a batter refers to the sloping or angled surface of an excavation |
| Batten | Timber member of small, rectangular cross-section. Sometimes used to screen the undercroft area. |
| Batt |  In the context of commercial construction in Australia, a batt refers to a type of insulation material used to reduce |
| BASIX |  The Building and Sustainability Index (BASIX) is a web-based planning tool designed to assess the potential performance of residential buildings |
| Basement |  In Australia, a basement is defined as a storey that is below ground level, as per the Building Code of |