CELING BOARDS & DECORATIVE CELING PANELS
Recommended thicknesses: 6mm & 8mm
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- The ceiling system adopted for Bison Panel is the usual suspended ceiling system. The usual methods adopted for any other suspension ceiling also will hold good for Bison Panel
- Thermal comfort depends on the thickness of the board chosen. The false ceiling can be either ‘T’ grid type or flush jointed type
- The false ceiling can be either ‘T’ grid type or flush jointed type. In either case, the longitudinal supports shall be spaced at 610 mm intervals and cross supports at 610 mm or 1220 mm centers
- Grid can be made either with steel or aluminums Tee sections or with timber with suitable wall line supports. The suspension arrangement can be with G.I. wires of adequate gauge taken to required level from the soffit.
- The grid shall be 610 x 610 mm or 610 x 1220 mm (2’0 x 2’0 or 2’0 x 4’0.)
- In case, Aluminum T-sections are used for the grid, the minimum thickness of the section shall be 1.2 mm and size 30 x 35 mm.
- Suspenders can be either 8 SWG G.I. wire or 0.7 x 12 mm G.I. flats. They are available in the market as coils.
- The maximum distance allowed between suspenders in longitudinal direction and cross direction is 1220 mm or 4’0. Closer intervals may be adopted depending on the soffit conditions.
- It is necessary to introduce a turn buckle in the suspender for easy and faster leveling of the grid. Ordinary G.I. Jolt can serve as turn buckle.
- It is important to fix wall rest perfectly level, as the level of the entire grid depends on the level of wall rest.
- In areas where change in humidity and temperature are appreciable and frequent, it is desirable to provide a lock pin on the top of the panels to ensure structural integrity of the grid and the panel. The lock pin can be either a headless nail or a screw taken across the web of the Tee section (please refer sketch). This will avoid lifting of the Board in the grid due to thermal expansion that may take place in the material of the grid or the Board.
- Wherever the lighting points occur, extra suspenders will have to be provided to take the load of the outfits.
- The panels will have to be painted in dry condition on both sides and the ends in particular before inserting them in the grid.
- A clearance of 1-2 mm shall be given between the board and the grid on all sides for taking care of thermal expansion if any.
- Fix light steel box section beams 100mm X 50mm and 1.6mm / 2mm thick at 4'-0 or 1220mm intervals across the walls or suspend them by means ofsuitable clamps fixed on the sofit.
- Fix principal C studs 75 X 50 X 20 – 1.6mm thick below the beams with screws.
- Fix common studs between principal studs at 4 feet intervals with suitable clamps.
- The board will have to be fixed on principal joists as well as common joists with 3 to 5mm gap. The gap can be filled with Acrylic filler or polysulfide as the case may be.
- Provide independent principal studs at the edge of the boards.
- Painting for the board has to be done on both sides and edges.
- When timber studs are used the same procedure may be followed.
- Half an hour fire resistant doors with Bison Board have been successfully tested at the Central Building Research Institute Roorkee. Shutter Frame is made out of hard wood with top, bottom, middle & intermediate rails and two vertical members, providing an air gap of about 25 mm. Bison Panels 12 mm thick, protected with a special coating are fixing on either side of the shutter frame.
- Door Frame is also made of hard wood suitably painted with a special coating around.
- Shutter is hung with 4 hinges from the door frame.