This document specifies the definition and calculation of surface area and volume indicators.
In defining area measurement, this document uses three measurement concepts:
a) the intra-muros and extra-muros concept used in many parts of the world;
b) the wall centre method of measurement used in many parts of the world;
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 document 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 document is intended to be used when establishing
— specifications for the geometric performance of a building and its spaces (e.g. in design, purchasing
procedures, etc., or in building regulations where appropriate),
— technical documentation relating to the performance of whole buildings prepared by designers,
contractors and manufacturers,
— the amount of floor area that will not be effectively available for the placement of an individual’s
workplace, furniture, equipment, or for circulation, and
— evaluation, comparison or control of the properties of a building which are connected to its geometric
performance.
NOTE Although 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 document specializes in the
measurement solely for practical use.

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EN 12464-2 specifies lighting requirements for outdoor work places, which meet the needs for visual comfort and performance. All usual visual tasks are considered. This European Standard is not applicable for emergency lighting; see EN 1838 and EN 13032-3. This European Standard does not specify lighting requirements with respect to the safety and health of workers at work and has not been prepared in the field of application of Article 153 of the EC treaty, although the lighting requirements, as specified in this standard, usually fulfil safety needs. Lighting requirements with respect to the safety and health of workers at work may be contained in Directives based on Article 153 of the EC treaty, in national legislation of member states implementing these directives or in other national legislation of member states. This European Standard neither provides specific solutions, nor restricts the designer’s freedom from exploring new techniques nor restricts the use of innovative equipment.

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This International Standard contains requirements for the competence of bodies performing inspection and for the impartiality and consistency of their inspection activities. It applies to inspection bodies of type A, B or C, as defined in this International Standard, and it applies to any stage of inspection.

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This European Standard specifies lighting requirements for indoor work places, which meet the needs for
visual comfort and performance. All usual visual tasks are considered, including Display Screen Equipment
(DSE).
This European Standard does not specify lighting requirements with respect to the safety and health of
workers at work and has not been prepared in the field of application of Article 137 of the EC treaty, although
the lighting requirements, as specified in this European Standard, usually fulfil safety needs. Lighting
requirements with respect to the safety and health of workers at work can be contained in Directives based on
Article 137 of the EC treaty, in national legislation of member states implementing these directives or in other
national legislation of member states.
This European Standard neither provides specific solutions, nor restricts the designers´ freedom from
exploring new techniques nor restricts the use of innovative equipment.
This European Standard is not applicable for the lighting of outdoor work places and underground mining or
emergency lighting.
For outdoor work places see EN 12464-2 and for emergency lighting, see EN 1838 and EN 13032-3.

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