1 Scope
This International Standard deals with the definition and calculation of surface area
and volume indicators.
In defining area measurement, this International Standard uses three measurement concepts:
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a) the intra-muros and extra-muros concept used in many parts of the world;
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b) the wall centre method of measurement used in many parts of the world;
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c) variations on these methods to comply with certain national laws, or for particular
types of buildings.
The surface area and volume indicators defined in this International Standard are intended for practical use, as a basis
for measuring various aspects of the performance of buildings or as a planning aid.
In other words, they should enable judgement to be made on functional, technical and
economic aspects of buildings.
This International Standard is intended to be used when establishing:
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— specifications for the geometric performance of a building and its spaces (e.g. in
design, purchasing procedures, etc., or in building regulations where appropriate);
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— technical documentation relating to the performance of whole buildings prepared by
designers, contractors and manufacturers;
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— the amount of floor area that will not be effectively available for the placement
of an individual’s workplace, furniture, equipment, or for circulation;
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— evaluation, comparison or control of the properties of a building which are connected
to its geometric performance.
Although, as stated above, there are a variety of methods of area measurement around
the world depending on the country and/or types of buildings, all measuring methods
are not necessarily of practical use because of inability to identify real area (e.g.
the wall centre method of measurement). Thus this International Standard specializes
in the measurement solely for practical use.