Class 1  A single dwelling being a detached house, town house or one or more attached dwellings, each being a building separated by a fire resisting wall including a row houses, terrace, town house or villa unit.

Class 2  A building containing 2 or more sole occupancy each being a separate dwelling.

Class 3  A residential building other than a building of Class 1 or 2.

Class 4  A dwelling in a building that is Class 5, 6, 7, 8 or 9, if it is the only dwelling in the building.

Class 5  An office building used for professional or commercial purposes.

Class 6  A shop or other building for the sale of goods by retail or the supply of services direct to the public.

Class 7  A carpark or storage or display of goods or produce for sale by wholesale.

Class 8  A laboratory or a building in which a handicraft or process for the production, assembling, altering, repairing, packing, finishing or cleaning of goods or produce is carried on for trade, sale or gain.

Class 9  A building of a public nature.

Class 10  A non-habitable building or structure.



Apex  The connection region between two top chords.

Bridge truss  This truss can be either a common or truncated truss. With overhang removed at heel. A bridge bracket is fitted to one or both of the cut off ends.

Chord  Structural member that forms the top and bottom component of a truss.

Common truss  Framed truss supported on both ends by load bearing walls. It forms the main roof block and gable ends. This is also known as a standard truss.

[Remainder of glossary terms can be viewed here]