BS EN 15221-6-2011 pdf download.Facility Management Part 6 : Area and Space Measurement in Facility Management.
4.2 Distance
For distances, it is necessary to distinguish between length, width and height. The length is measured as linear extent from end to end (measurement of a horizontal distance). The width is measured as linear extent from side to side (measurement of a horizontal distance). The height is measured as linear extent from top to bottom (measurement of vertical distance).
NOTE I Width is equal to or smaller than length.
For lengths, widths and heights it is distinguished between gross and net distance:
the gross length / width is measured as horizontal distance between the outer limiting faces of exterior walls or the horizontal distance between the centres of interior walls;
the net length I width is measured as horizontal distance between the inner limiting laces of walls. whereby incidental structural components are not taken into consideration:
the gross height is measured as vertical distance between the top of a finished floor or the adjoining land and the top of the finished floor of a room situated above it or the top of the roof structure;
NOTE 2 For the lowest storey in the building, gross height has to be measured to the botlom of the floor (up to the maximum of an ordinary floor).
the net height is measured as vertical distance between the top of a finished floor or the adjoining land and the bottom of a ceiling or root situated above it, whereby incidental structural components are not taken into consideration:
the free height is measured as vertical distance between the top of a finished floor or ground level and the underside of the suspended ceiling that is situated above It, whereby incidental structural components are not taken into consideration.
4.4 Volume
Volumes are measured by their actual dimensions. Inclined planes. whether floors or walls, define inclined bounds to the volume. Gross volumes are determined by the gross distances, net volumes are determined by the net distances. Note that Non-functional Level Area concepts such as voids do not apply here. When measuring volumes, a multi-level space is measured as a single volume.
5 Framework of area and space measurement of buildings
5.1 General
Buildings. rooms and floors shall be measured at the floor level (at the height level to the top of a finished floor). Every floor level shall be measured separately. Areas with varying net heights within one floor level may be calculated separately.
The area of a floor shall be determined as the area of the vertical projection onto the horizontal plane. Wall openings in interior and exterior walls are also measured by the vertical projection of their outer limits at floor level onto the horizontal plane and belong to the volume and area of exterior and interior walls.
See Annex B for further information.
For all categories of areas it is distinguished between:
A spaces which are entirely covered and enclosed on all sides up to their full height;
B spaces which are entirely covered, but not enclosed on all sides up to their full height (e.g. recessed balconies);
C spaces which are not covered, but contained within components (e.g. open balconies).
5.2 Level Area (LA)
Level Area is a measured area for one level, including all areas contained inside and measured to the outside permanent finished surface. This includes penthouses and mezzanines, basement and enclosed/covered connecting walkways and linkways.
Separate buildings have to be measured independently.
Here follows an exhaustive list of the elements contained within this term:
a) voids, atnums and cavities;
b) perimeter wall thickness;
C) external columns and piers;
d) structural walls and partitions;
e) internal columns and piers;
f) non-structural walls;
g) flexible and movable partitions:
h) rooms for mechanical services installations (e.g. lift rooms and boiler rooms as well as heating and cooling apparatus);
I) rooms for electrical services installations (e.g. conductors and generators as well as mains communication rooms);
j) rooms for other services installations (e.g. waste management installations and facilities maintenance stores);
k) stairwells, lift-wells and escalators;
I) corridors and other circulation areas;
m) amenities include all sanitary areas (e.g. toilets, showers and changing rooms as well as cleaners’ rooms);
n) central support spaces (e.g. entrance halls and catering spaces as well as social and recreational spaces);
0) local support spaces (e.g. meeting spaces, filing and storage space as well as print and copy areas);BS EN 15221-6-2011 pdf download.