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Architectural Specification for Conceal Ceiling Suspension System

A) Suspension System

  1. The Suspension system for gypsum board shall be Conceal Ceiling Suspension System, Ceiling       Pattern A and complying with JIS A6517 standard
  2. The ceiling furrings shall be made of hot-dip galvanized steel. The cross sectional dimension of CC-25 Carrying Channel and CW-25 Double Furring shall be 38 x 12 x 1.6mm and 50 x 25 x 0.5mm respectively.
  3. As an alternative proposal, the supporting calculation shall be submitted and approved by the Architect  to ensure that the structural is adequate to sustain the ceiling load.

  

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B) Suspension System

  1. Gypsum board shall be Gypsum Board of size 4' x 8' x 5/8" thick with tapered edges  and complying with ASTM C36 and BS 1230 Standard.

C) Installation

  1. Installation of the 9mm dia. threaded suspension both shall be fixed by suitable insert to the underneath of slab soffit. Spacing of suspension both must be at 1200m Max. in either direction and at perimeter of ceiling as required.
  2. The carrying channel must be placed at 1200mm Max. shall be hung to the lower part of the suspension bolts by means of galvanized steel hangers and nuts.
  3. The double furring at a spacing of 407mm Max. shall be fixed to the carrying channel with double clips at each intersection. Double clips must as a rule alternate with the sides of the carrying channel.
  4. Rigid and aligned system for the fixing of ceiling board must be provided with separated pieces of carrying channel and double furring to be jointed by channel joint and double joint respectively.
  5. Extra hangers to be provided where opening are required for light fittings and access panels.
  6. All components must be well fixed and the suspension system must be correctly aligned and accurately leveled before attaching the ceiling board.
  7. The gypsum board shall be fixed by S25 screws at 300m Max. to the double furring with long edges of the gypsum board placed parallel to the double furring.
  8. Finish of all joints and screw heads with joint tape and Goldkote joint tape compound must be in accordance with manufacturer's instruction which shall be approved by the Architect and sand smooth.
  9. Plastering and Painting works can be proceeded.

      Ceiling Installation Pattern

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