General information, optic specifications, index

L948D949_SRC.QXD 11-03-2004 08:16 Pagina 12.10
Information – Specification data luminaires
False ceilings
Ceiling types – introduction
Today, architects and building contractors can choose from an
enormous variety of ceiling systems, especially ones designed for
offices and other general applications. Use of climate ceilings
(cooled) is growing.
The four main standard ceiling types are:
1.Visible profile ceilings
2. Concealed profile ceilings
3. Strip ceilings
4. Panel ceilings
Obviously, there are small differences between ceiling types, but the
application of luminaires and the accessories you will need for
mounting them are the same for all the systems.
The four standard system types discussed here represent the vast
majority of ceiling systems currently available.Also real “projectmade”
plaster ceilings are used more and more and seen as
aesthetical pleasing solutions. If you decide to use another type of
system, contact your Philips organisation and they will inform you
about the options in your specific situation. If no standard solution is
available, a special solution in the luminaire concept can be discussed.
1. Visible profile ceilings
In this very common system, profiles are
always visible. Ceiling tiles rest on the
profiles and are in most cases made from
a mineral material.
The two standard module sizes are
300 mm and 312,5 mm.
The most popular tiles in this type of
ceiling are for ceiling grids of 600x600 mm
and 600x1200 mm, or 625x625 mm and
625x1250 mm. In this type of ceiling,
luminaires will be mounted as an inlay.
Applications
These ceiling types are usually used when
electrical wiring, LANs and other technical
installations are hidden behind the ceiling.
Also in this application the ceiling should
contribute to the acoustic environment.
All Philips recessed luminaires are suitable
for this kind of ceiling.
12.10 GENERAL INFORMATION, OPTIC SPECIFICATIONS, INDEX
Ceiling tile materials
Different ceiling types use panels or tiles of different materials.
The most popular materials are:
Mineral (hard and soft)
These are produced in thicknesses between 14 and 20 mm.
Mineral tiles are usually painted and always mechanically vulnerable.
Acoustic qualities of these types of ceilings are reasonable.
Plaster
Plaster ceilings are usually 10-15 mm thick and are non-removable
ceilings. If recessed luminaires are to be used in this kind of ceiling
an opening has to be cut out before mounting the luminaire.
Metal
Metal is used in tiles, strips and/or panels. In some cases they are
perforated and have a sound-insulating layer on top.This layer helps
to create good acoustic quality. Recessed luminaires are usually
designed so that they can replace a complete ceiling tile.