external-wall
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External wall
NCC
for the purposes of Volume One, means an outer wall of a building which
is not a
common wall
.
NCC
for the purposes of Volume Two, means an outer wall of a building which
is not a
separating wall
.
Standards
the external vertical or near vertical wall system of a building, either structural or non-structural, including the façade, skin and all substrates along with finishes, attachments and cavities
Details such as balconies, windows, window shutters and curtains are not considered in the classification.
Source - AS 5113:2016: Classification of external walls of buildings based on reaction-to-fire performance
HB50
<3> means an outer wall of a building which is not a common wall
<1> wall that separates the internal space of the building from the external environment. outside wall of a building
Usually the external wall is required to be weatherproof, eg keep rain from entering the internal rooms.
<2> means an outer wall of a building which is not a separating wall
Source - BCA Vol 2 terminology
<3> means an outer wall of a building which is not a common wall
Source - BCA Vol 1 terminology