Ceiling

Ceiling Finishes

• Ceiling materials are to be selected based on the following characteristics to ensure the appropriate ceiling is used:
  • Internal Acoustic requirements for the space.
  • Acoustic insulation requirements between spaces.
• Access requirements to services and equipment located in the space above the ceiling.
• In existing buildings, ceilings are generally off-form concrete painted where appropriate.
• False ceilings where required, are to be flush plasterboard, plasterboard tiles or standard acoustic tile in an exposed grid as indicated within the room space data table. Ceilings concealing air conditioning or other services are to be of removable panels
• Any non panelized ceilings are to have a sufficient number of lockable access hatches similar to Rondo.
• Access requirements for servicing and maintenance are to be indicated on service engineer's drawings with access panels included as part of the works.
• See Clauses A2.18 and G1.7.

Ceiling Heights and Ceiling spaces

• Ceiling Heights are to meet (or exceed) the minimum requirements set out within building regulations.
• Unless the Brief states otherwise, the floor to ceiling height throughout office and teaching areas is to be at least 2700 mm.
• Where services occupy ceiling spaces, the dimension from top of ceiling to underside of slab or beam, or roof is to be 400mm minimum.

Ceiling Selection Requirements

The following table sets out the Ceiling requirements based on the functional space requirements. 

Gridded Acoustic Tile Ceiling

Gridded Acoustic Tile ceilings are the preferred ceiling type as they:

• Meet the acoustic requirements for the internal spaces.
• Provide access for maintenance of services and future service installation.

Gridded Acoustic Tiled Ceiling is to include the following:

• Suspended concealed suspension system
• Perforated tile ceiling
• Ceiling material: Mineral fibre tile.
• Finish: Factory pre-finished in white
• Panel size: Preferred - 1200 x 600mm, other sizes may be considered subject to MQP office approval.
• Perforation pattern: Micro textured surface.
• Suspension system: Proprietary 2way ceiling grid to suite panels
• Fixing: To the manufacturer's recommended details.
• Sheet edge: Square edged profile.
• Perimeter detail: 10mm shadow angle trim at wall to ceiling junctions.
• NRC 0.55 min Refer to Acoustic Design Guidelines.
• Specify the appropriate acoustic blanket to suit the requirements of the room.

The following acoustic ceiling systems are acceptable.

Preferred Supplier

Flush Plasterboard Ceiling

Flush Plasterboard ceilings are to be included as indicated in Rooms and Spaces Data.

Flush plasterboard ceilings may be used in conjunction with other ceiling types such as perforated

plasterboard or Acoustic ceiling panels.

Flush Plasterboard Ceilings are to include the following:

• Ceiling material: 13mm plasterboard generally & 13mm wet area plasterboard to Wet Areas.
• Sheet edge: Tapered for flush jointing.
• Joints: Flush.
• Perimeter detail: 10mm shadow angle trim at wall to ceiling junctions.
• Proprietary item: Rondo P50 shadow line stopping angle.
• Finish: Painted.
• Fixing: Screw fixed to the sheet manufacturer's recommended sizes and spacing's.
• Include proprietary ceiling support system:
  • Suspension system: Approximately 25 x 38mm galvanised steel furring channels at maximum 600mm centres, fixed to approximately 38 x 20mm suspended galvanised steel top cross rails at maximum 1200mm centres. Suspend the top cross rails from the building structure above with galvanised steel rod at maximum 1200mm centres.
• Or
  • Fixed directly to roof framing: Approximately 25 x 38mm galvanised steel furring channels at maximum 600mm centres connected to direct fixing clips fixed to roof framing.
• Access Panels: Provide proprietary access panels (450m x 450mm or 600mm x 600mm) as required to enable access to all concealed ceiling voids in a location as agreed by MQP office.
• Access panel location to be co-ordinated with adjacent ceiling services.

Corrugated and Perforated Metal Ceiling System

Corrugated Perforated Metal ceilings are to be included as indicated in Rooms and Spaces Data.

Ceiling System is to include the following:

• Proprietary perforated and roll-formed corrugated steel zincalume sheet and purpose made accessories forming part of a system to AS 1562.1.
• Furring/fixing system: Proprietary black matt finished universal carrier rails or furring system. Comply with the manufacturer's recommended spacings, spans and fixing requirements.
• Wall trims: Cold rolled steel angles, colour finish to match ceiling panels, fixed to walls at 600 mm centres.
• Material: Pre-painted and organic film/laminate products: To AS 2728, Category 3 or 4 as appropriate to all ceiling sheets/panels and metal trims.
• Thickness: 0.42 mm (minimum) B.M.T. (Base Metal Thickness).
• Corrugation depth: 6 mm (minimum).
• Include Concealed suspended ceiling grid
• Include Polyester fibre black lined acoustic blanket manufactured from thermally bonded polyester. Finish: Black

Linear metal ceiling lining

Linear Metal Ceiling Systems may be included to provide

• Increased acoustic performance, refer to Acoustic Design Guides
• Variation in the ceilings to provide definition.

Ceiling System is to include the following:

• Perforated linear metal ceiling, consisting of panels made from colour-coated 0.4mm thick galvanised steel, 84mm wide x 15mm deep with square sides.
• Finish: Polar White, 5% gloss.
• Suspension system: Panel carriers made from colour-coated 0.5mm thick steel, matt black, 62mm wide x 29mm deep, with prongs to hold the panels in a module of 50mm.
• Installation: In accordance with the manufacturer's fixing instructions.
• Acoustic blanket: Polyester fibre black lined acoustic blanket manufactured from thermally bonded polyester. Finish: Black

Perforated plasterboard ceiling

Flush Plasterboard Ceilings are to include the following:

• Ceiling material: 13mm perforated plasterboard.
• Sheet edge: Tapered for flush jointing.
• Joints: Flush.
• Perimeter detail: 10mm shadow angle trim at wall to ceiling junctions.
• Proprietary item: Rondo P50 shadow line stopping angle.
• Finish: Painted.
• Fixing: Screw fixed sheets to manufacturer's recommended sizes and spacing's.
• Acoustic blanket: Polyester fibre black lined acoustic blanket manufactured from thermally bonded polyester. Finish: Black
• Access Panels: Provide proprietary access panels (450m x 450mm or 600mm x 600mm) as required to enable access to all concealed ceiling voids in a location as agreed by MQU office.
• Access panel location to be co-ordinated with adjacent ceiling services.

Acoustic impervious suspended ceiling

• Type: Fire resistant proprietary acoustic impervious ceiling panels with a high density, resin bonded insulation with primed edges and a white micro-porous painted surface specially designed for use in hygienic locations. The surface must be capable of being cleaned on a regular basis with a damp cloth.
• Size (nominal): 1200 x 600 x 20mm thick or 600 x 600 x 20mm thick.
• Suspension system: A proprietary corrosion resistant grid suspension system in accordance with the manufacturers printed instructions. Provide accessories and trim to complete installation.
• Installation: Seal between panels and back face of grid with a silicone sealer. Leave two panels near entrance to room unsealed for access above ceiling.
• Provide openings for, and fit the ceiling system up to, service elements such as light fittings and ventilation grilles. Seal all penetrations with a impervious joint sealing compound
• Cut edges must be resealed with an impervious edge sealer.
• Ceiling clips: Proprietary compatible anti lift ceiling clips. Clips are to be evenly configured in accordance with the manufacturers printed instructions.
• NRC: >85
• Weight including grid system (nominal): 3 to 4kg/m²
• Colour: White

Non Combustible Ceiling

Non Combustible ceilings are required in a number of location, particularly where the function of the space may include potential hazards, these include, laboratory preparation areas, chemical stores etc,

Non-combustible ceilings include:

• Fire rated grade plasterboard ceiling with flush set joints,
• Fibre Cement ceilings with flush set joints internally
• Profiled metal or paneled Metal ceilings.

Ceiling Suspension Systems

Where indicated for suspended ceilings Include proprietary ceiling support system:

• Suspension system: Approximately 25 x 38mm galvanised steel furring channels at maximum 600mm centres, fixed to approximately 38 x 20mm suspended galvanised steel top cross rails at maximum 1200mm centres. Suspend the top cross rails from the building structure above with galvanised steel rod at maximum 1200mm centres.

Or

• Fixed directly to roof framing: Approximately 25 x 38mm galvanised steel furring channels at maximum 600mm centres connected to direct fixing clips fixed to roof framing.