In the context of commercial construction in Australia, an arris refers to the sharp edge formed by the intersection of two surfaces, such as the corner of a masonry unit . This definition is applicable to various types of construction, including framed construction (steel and timber), masonry veneer, and full masonry construction .

The Australian Building Codes Board (ABCB) and the Building Code of Australia (BCA) provide guidelines and regulations for commercial construction in Australia . However, these sources do not provide a specific definition of arris that differs from the general definition used in architecture.

In commercial construction, the term arris may also be used to describe the external angular intersection between two planar faces (an edge), or two curved faces, as in moldings or between two flutes on a Doric column .

It is worth noting that there are companies and products that use the name "Arris" in the context of construction and water treatment in Australia, such as Arris Construction and Arris water treatment technologies . However, these uses of the term "Arris" are not related to the definition of arris in commercial construction.

In summary, the definition of arris in commercial construction in Australia refers to the sharp edge formed by the intersection of two surfaces, and is applicable to various types of construction, including masonry and framed construction.