ABSTRACT
Plasterboards should be fixed breaking joint to the underside of floor or ceiling joists with zinc plated nails or dry-wall screws at 150mm max. spacing. The junction at ceiling to wall is reinforced with glass fibre mesh scrim tape or a preformed plaster moulding. There is no standard method of classification since some are classified by their function, such as illuminated and acoustic suspended ceilings, others are classified by the materials used and classification by method of construction is also a popular option. Jointless suspended ceilings provide a continuous and jointless surface with the internal appearance of a conventional ceiling. Panelled suspended ceilings are the most popular form of suspended ceiling consisting of a suspended grid framework to which the ceiling covering is attached. Decorative and open suspended ceilings usually consist of an openwork grid or suspended shapes onto which the lights fixed at, above or below ceiling level can be trained, thus creating a decorative and illuminated effect.
