This International Standard deals with the definition and calculation of surface area and volume indi-cators.
In defining area measurement, this International Standard uses the intra-muros and extra-muros concept. The wall centre method of measurement used in many parts of the world, or for particular types of buildings, is not considered in this Interna-tional Standard.
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 as-pects.
This International Standard is intended to be used when establishing:
— specifications for the geometric performance of a building and its spaces (e.g. in design, pur-chasing procedures, etc., or in building regu-lations where appropriate);
— technical documentation relating to the perform-ance of whole buildings prepared by designers, contractors and manufacturers.
— evaluation, comparison or control of the proper-ties of a building which are connected to its geometric performance.