AS 2946-1991

Specifies requirements for certain features of suspended ceilings, recessed luminaires and associated air diffusers with the object of ensuring physical compatibility when installed. Applies principally to luminaires with tubular fluorescent lamps designed for use in the most common types of suspended ceilings. Does not apply to suspended ceiling of fire-rated construction.

This Standard specifies requirements for certain features of suspended ceilings, recessed luminaires and air diffusers with the object of ensuring physical compatibility when installed. A schematic illustration of the physical interactions involved is given in Figure 1.1 which also identifies the sections of this Standard that specify the applicable requirements.The requirements of this Standard apply principally to luminaires with tubular fluorescent lamps which are designed for use in-(a) exposed, semi-exposed and concealed ceiling systems which utilize pressed metal tiles, viz. metal pan ceilings;(b) exposed and semi-exposed ceiling systems which utilize tiles of various materials other than pressed metal; and(c) flush or sheeted ceilings affixed to metal or timber supports.Certain requirements may also be applicable to luminaires designed for use with other types of suspended ceiling systems and to luminaires which utilize other lamp types. However, the requirements do not apply to suspended ceilings which are required to be of fire-rated construction. The Standard incorporates a system for designating recessed luminaires according to the type of suspended ceiling in which they are intended to be used, the mounting method adopted and whether or not they are provided with air-handling facilities (see Table 1.1).The Standard does not purport to cover all essential requirements for suspended ceilings, recessed luminaires or air diffusers. Attention is particularly drawn to Standards which deal with-(i) the design and installation of suspended ceilings (see AS 2785); (ii) essential safety requirements for luminaires (see AS 3137); (iii) interior lighting, including the control of glare from luminaires (see the AS 1680 series); and (iv) the ventilation and air conditioning of buildings (see AS 1668.1 and AS 1668.2).NOTE: Appendix A provides details of the information which should be provided to facilitate the physical compatibility of suspended ceilings, recessed luminaires and air diffusers.

First published as AS 2946-1987.Second edition 1991.Reconfirmed 2013. First published as AS 2946-1987. Second edition 1991.