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Suspended ceilings - combined

By Tracy Allen,2014-05-01 14:48
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Suspended ceilings - combined

Woodside General Learning Areas (6) 0531 SUSPENDED CEILING COMBINED

0531 SUSPENDED CEILINGS COMBINED

    1 GENERAL

    1.1 AIMS

    Responsibilities

    General: Provide suspended ceilings to the Selections and as follows.

    - Consistent in finish treatment.

    1.2 CROSS REFERENCES

    General

    General: Conform to the General requirements worksection.

    Associated worksections

    All sections of this specification are to be referred to as one document. 1.3 STANDARDS

    General

    Suspended ceilings: To AS/NZS 2785.

    Luminaire and air diffuser interface: To AS 2946.

    1.4 INSPECTION

    Notice

    Inspection: Give notice so that inspection may be made of:

    - The suspension system before the installation of ceiling tiles or panels. - The ceiling assembly before the installation of fittings and site painting, if applicable. - The completed ceiling.

    1.5 SUBMISSIONS

    Samples

    General: Submit samples as follows:

    - Suspension system: Sections proposed for the suspension system, including wall angles and trim.

    - Ceiling material: Sheet, panel, tile and strip, with insulation, showing the extremes and mean of

    variation in colour, pattern, or texture of the proposed finish. - Methods: Methods of jointing, fixing, height adjustment, retaining and removing panels. Installation

    Set-out: Submit proposed set-out indicating cut panels if any, before installation. Cutting strawboard panels

    General: If cutting is unavoidable, submit details of the methods proposed for maintaining the integrity

    of the boards at cut edges.

    Type tests

    General: Submit type-test reports to verify conformance with the Suspended ceilings performance

    schedule and as follows:

    - Fire hazard properties: 2. Average specific extinction area (non-sprinklered buildings): < 250 m/kg to AS/NZS 3837.

    . Group number: To BCA Spec C1.10a-3.

    . Smoke-developed index: To AS/NZS 1530.3.

    . Smoke development rate: < 750 percent-minutes to AS ISO 9239.1. . Smoke growth rate index (non-sprinklered buildings): < 100 to AS ISO 9705 and BCA Spec A2.4.

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    Woodside General Learning Areas (6) 0531 SUSPENDED CEILING COMBINED

. Spread of flame index: To AS/NZS 1530.3.

    - Fire resistance level: To AS 1530.4.

    - Weighted suspended ceiling normalized level difference: To AS/NZS 1276.1 or ISO 717-1.

    - Weighted sound absorption coefficient: To AS ISO 11654. 2 PRODUCTS

    2.1 SUSPENSION SYSTEM

    Proprietary system

    General: Provide in conformance with the Proprietary suspended system schedule.

    2.2 CEILING TILES

    Tiles

    General: Provide in conformance with the Ceiling tile schedule.

    Plasterboard tiles

    Glass fibre reinforced gypsum plasterboard: To AS 2590. Plasterboard: To AS/NZS 2588.

    Fibrous plaster tiles

    Standard: To AS 2185 with hard cast plaster face. 2.3 LININGS

    Plasterboard

    Standard: To AS/NZS 2588.

    Fibrous plaster sheet

    Standard: To AS 2185.

    Glass fibre plasterboard

    Standard: To AS 2590.

    Fire resistant: Formulated for additional resistance to fire exposure.

    Fibre cement

    Standard: To AS/NZS 2908.2.

    Wall and ceiling linings: Type B category 2. Minimum thickness: 4.5 mm.

    Plasterboard panels

    Glass fibre reinforced gypsum plasterboard: To AS 2590. Adhesives

    For plasterboard: To AS 2753.

    Sealants

    Fire rated sealant: Non-hardening sealant compatible with the materials to be sealed and having a fire

    rating equal to that of the partition it seals. Acoustic sealant: Non-hardening sealant compatible with the materials to be sealed and rated to R w

    65.

    2.4 PROPRIETARY CEILING SYSTEMS

    Proprietary systems

    Consistency: Provide suspended ceilings as complete proprietary systems, each fabricated by one

    manufacturer and installed by a specialist installer of demonstrated capacity.

    System: Provide panel, strip, tile or open grid ceilings in conformance with the Proprietary system schedule.

    Support: Complete proprietary suspension system fixed to the structural soffit.

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Woodside General Learning Areas (6) 0531 SUSPENDED CEILING COMBINED

3 EXECUTION

    3.1 SUSPENSION SYSTEM

    Ceiling grid

    General: Set out the ceiling grid so that tile or panel joints and centrelines of visible suspension members coincide with grid lines shown on the drawings. If not otherwise shown, set out so that opposite margins are equal.

    Suspension system

    Failure: Provide a ceiling system such that failure of any one suspension point does not cause a progressive failure of the ceiling.

    Height adjustment: Provide height adjustment by means of a length adjustment device at each suspension point, permitting length variation of at least 50 mm.

    Ceiling hangers are to be screw fixed with AS 3566 fixings to webs of steel purlins where fixing is required to roof structures. Where fixings are required to concrete slab structures, secure with appropriate sized ‘Loxin’ or similar masonry anchors.

    Grid members: If required, notch grid members at the junction with the perimeter trim to ensure the panels lie flat on the perimeter trim.

    Restriction: Do not attach the suspension system to the lip of purlins.

    Services

    Support: Space the support members as required by the loads on the system and the type of ceiling, and allow for the installation of services and accessories, including ductwork, light fittings and diffusers. Provide additional back support or suspension members for the fixing of such items to ensure that distortion, overloading or excessive vertical deflection is prevented. Do not fix suspension members to services (e.g. ductwork) unless the service has been designed to accept the ceiling load. In locations where services obstruct the ceiling supports, provide bridging and suspension on each side of the services. Do not support services terminals on ceiling tiles or panels. Partitions

    General: If partitions are attached to the underside of the ceiling systems include the partition mass in the seismic mass of the ceiling.

    Protection

    General: Protect existing work from damage during the installation.

    Stability

    General: Install the ceilings level; and fix so that under normal conditions there is no looseness or rattling of ceiling components.

    Structure-borne sound

    General: Provide a ceiling system which does not amplify structure-borne sound. Provide suitable proprietary products or systems for reducing contact vibrations between structure and ceiling. Bracing

    General: Provide bracing to prevent lateral movement and to resist the imposed horizontal seismic force.

    Bulkheads

    General: Construct bulkheads and other similar ceiling formations as an integral part of the ceiling structure. Brace bulkheads to prevent lateral movement. If the ceiling is terminated at a bulkhead, provide for seismic requirements.

    External suspended soffits

    General: Support external suspended soffits on rigid members capable of carrying the imposed loads. Install members to minimise any eccentricity, and ensure that the upward and downward wind loads are carried through to the supporting structure.

    Fasteners

    General: Install fasteners so that they are not visible in the finished ceiling. Do not use screw fasteners in materials supporting hangers less than 3 mm thick.

    Movement joints

    Abutments: Install the ceiling to allow for differential movement at abutting surfaces.

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    Alignment: Install the ceiling with control joints to correspond in location and direction to those in the structural frame. Do not bridge any control joint in the structural frame.

    Prefinishes

    General: Repair damaged prefinishes by recoating.

    Curtain recesses

    General: Provide curtain recesses, including:

    - Lining.

    - Curtain track support.

    - Accommodation for motors and cabling.

    3.2 TILES

    General

    Fitting: Fit tiles accurately and neatly, free from air leakage and staining.

    Lock clips: If tiles are exposed to wind loads or if required for security, insert lock clips at the junction of carrier rails and tiles.

    Pattern and texture: Set out patterned or heavily textured materials to give consistency in direction of pattern or texture.

    Service penetrations

    General: Provide openings for, and fit the ceiling up to, all services elements such as light fittings, ventilation outlets, detectors, sprinklers and loudspeakers.

    Cut tile edges

    General: Conceal, or finish to match prefinished edges.

3.3 PLASTERBOARD LINING

    Installation

    Gypsum plasterboard: To AS/NZS 2589.1.

    Fibre reinforced gypsum plaster: To AS/NZS 2589.2.

    Suspended flush ceilings: Fix using screw or screw and adhesive to ceiling members or support frame. Multiple sheet layers

    Application: Fire rated and acoustic rated walls.

    Joints: Fill and flush up all joints and fixings in each layer and caulk up perimeters and penetrations before commencing succeeding layers. Stagger all sheet joints by minimum 200 mm.

    Joints

    Flush joints: Provide recessed edge sheets and finish flush using perforated paper reinforcing tape. Butt joints: Make joints over framing members or otherwise provide back blocking. External corner joints: Make joints over metallic-coated steel corner beads.

    Control joints: Install purpose-made metallic-coated control joint beads at not more than 12 m centres in walls and ceilings and to coincide with structural movement joints.

    Wet areas: Install additional supports, flashings, trim and sealants as required. 3.4 FIBRE CEMENT LINING

    Installation

    General: Run sheets across the framing members. In flush jointed applications, stagger end joints in a brick pattern and locate them on framing members, away from the corners of large openings. Provide supports at edges and joints.

    Suspended flush ceilings: Fix using screw or screw and adhesive to ceiling members or support frame. Wet areas: To AS 3740.

    Multiple sheet layers

    Application: Fire rated and acoustic rated walls.

    Joints: Fill and flush up all joints and fixings in each layer and caulk up perimeters and penetrations before commencing succeeding layers. Stagger all sheet joints by minimum 200 mm.

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Joints

    Flush joints: Provide recessed edge sheets and finish flush using perforated paper reinforcing tape. Movement joints in ceilings and soffits: Provide movement joints to divide ceilings into bays not larger than 10.8 x 7.2 m and soffit linings into bays not larger than 4.2 x 4.2 m or 5.4 x 3.6 m. Provide framing parallel to the joint on each side. Do not fix the lining to abutting building surfaces. External corner joints: Make joints over metallic-coated steel corner beads.

    Dry joints: Provide square edged sheet and finish with a UPVC joining section. Control joints: Provide purpose-made metallic-coated control joint beads at ? 7.2 m centres in walls

    and ceilings and to coincide with structural movement joints.

    Wet areas: Provide additional supports, flashings, trim and sealants as required. 3.5 ACCESS PANELS

    Finish

    General: Match the access panels to the ceiling in appearance and performance. Identification

    General: Provide each access panel with an identification mark.

    Non-demountable ceilings

    General: Provide access panels supported and anchored to permit ready removal and refixing. Reinforcement

    General: Reinforce the back of the access panel to prevent warping and facilitate handling. 3.6 PROPRIETARY LINING UNITS

    General

    Fitting: Fit ceiling lining units accurately, neatly and without distortion. Provide backing support (via suspension system) and bracing to lining units required to carry dead loads other than their own weight. eg. Downlights

    Panel lock clips: If panels are exposed to wind loads or if required for security, insert panel lock clips at the junction of carrier rails and panels.

    Accessories

    General: Provide accessories as part of the proprietary assembly necessary to complete the installation.

    Service penetrations

    General: Provide openings for, and fit the ceiling system up to, all services elements such as light fittings, ventilation outlets, detectors, sprinklers and loudspeakers.

    3.7 TRIM

    General

    General: Provide trim such as beads, mouldings and stops to make neat junctions between lining components, finishes and adjacent surfaces.

    Control joints

    Location: Provide for control joints in sheet finishes where required by the Lining worksection. Where

    possible, position joints to intersect lighting fixtures, vents or air diffusers. Type: Form movement joints with purpose-made control joint beads.

    Plasterboard cornices

    Fixing: Adhesive fix with the supplier’s cornice cement. Pin in place at cornice edges until adhesive sets, remove pins and fill holes.

    Fibrous plaster cornices and roses

    Accessible ceiling spaces: Pin or prop in place and fix with wet plaster of Paris and scrim straps over framing members.

    Fire rated walls

    Seal to soffit with sealant of matching fire rated level prior to fixing decorative cornices.

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    Woodside General Learning Areas (6) 0531 SUSPENDED CEILING COMBINED

3.8 COMPLETION

    Maintenance manual

    General: On completion, submit a manual of recommendations for the care and maintenance of the

    ceiling, and operating instructions for demounting if applicable. Spares

    General: Supply spare matching lining units and accessories of each type for future replacement

    purposes. Store the spare materials on site where directed. Supporting system: One spare supporting member (hanger or framework member) for every 100

    members (or part thereof) of the same type installed in the ceiling. Lining units: One spare unit for every 50 units (or part thereof) installed in the ceiling.

    4 SELECTIONS

    Suspended ceilings schedule

Ceiling Code FPB

    Description Flush plasterboard ceiling

    Demountability Non

    Suspended ceiling system: Rondo Screw-up ceiling suspension system

     Type

    1200mm x 600mm Basic grid (l x b) (mm)

    Zinc coated steel Material

    Flush plasterboard ceilings and bulkheads concealed fixings Description

    Flushed Form

    13mm Thickness (mm)

    Refer FINISHES SCHEDULE Colour

    Painted Finish

    Trim Rondo P50 Shadowline to suit 13mm plasterboard

Ceiling Code PCO

    Description Perforated Custom Orb

    Demountability Non

    Suspended ceiling system: Black painted Rondo Screw-up ceiling suspension system

     Type

    1200mm x 600mm Basic grid (l x b) (mm)

    Zinc coated steel Material

    Concealed fixings Description

    0.42 BMT Thickness (mm)

    Refer FINISHES SCHEDULE Colour

    Colorbond Finish

    Trim Matching angle trim as detailed on drawings

Ceiling Code VB

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Description Flush Villaboard ceiling

    Demountability Non

    Suspended ceiling system: Rondo Screw-up ceiling suspension system Type

    1200mm x 600mm Basic grid (l x b) (mm)

    Zinc coated steel Material

    Flush plasterboard ceilings and bulkheads concealed fixings Description

    Flushed Form

    6mm Thickness (mm)

    Refer FINISHES SCHEDULE Colour

    Painted Finish

    Trim Rondo P60 Shadowline to suit 9mm FC lining

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