FALSE CEILING/DROPPED CEILING

Suhail AlamB.Arch 4th year

Sharda University

INTRODUCTION

• False ceiling or dropped ceiling is a secondary ceiling, hung below the main structural ceiling usually concrete or timber.• Dropped ceilings are created to hide the building infrastructure,

including piping, wiring, and ductwork, by creating a space above the dropped ceiling, while allowing access for repairs and inspections.• Another purpose of dropped ceiling is to develop aesthetical details

which are difficult and structurally difficult to construct.• Dropped ceilings are also use to reduce the volume of the space so

that the heating and cooling load can be reduced.• Acoustic balance and control was another early objective of

dropped ceilings.

Types of false ceilings

Exposed ceiling• A system where grid is visible and

into which panels are laid. The grid is finished in colors to harmonize with the panels.

• Panels are manufactured from a variety of materials including rock fiber, glass fiber, mineral fiber etc. common size of the panel is 1200x600, 600x600 and 500x500.

Concealed ceiling• A system where, after tiles are

installed, the grid is not visible.

• Gypsum plasterboard ceiling is the most commonly used concealed ceiling.

• Gypsum plaster board has taken the place of POP ceiling due to its ease of installation.

Exposed ceiling system components

• Main tee runner• Cross tee• Wall angle or parameter channel• Galvanized hanger wire• Angel cleat• Expansion anchor or fasteners• Mineral fiber board or ceiling tile

Exposed grid ceiling component fixing details

Main runner tee

Cross teeParameter channel

Angle or hanger wire

Gypsum plasterboard ceiling components

Gypsum plasterboard ceiling fixing detail

Primary support channel

Parameter channel

Angle support

Ceiling section

Gypsum plasterboard 900x1800

Concealed/plasterboard ceiling installation process

Advantages and disadvantages of dropped ceilings

Exposed grid ceilingAdvantages

• Ease of access

• Ease in replacement

• Ease in fitting lighting fixtures

Disadvantages

• Visible grid

• Reduced headroom

• Damaged easily when handled

Concealed gypsum plasterboard ceilingAdvantages

• Monolithic

• Sound absorbing ability

• Fire resistant

Disadvantages

• Inability in accessibility

• Pest and rodent problem is not detectible

• Problem in replacement

Thank you