PERFORMANCE DATA
The CSR Gyprock© High Performance Ceiling System is a new floor/ceiling system that restricts noise filtering through from rooms above and below.

The system gives a timber floor structure the levels of acoustic and fire isolation you only thought possible with concrete. Till now. By having superior acoustics and lighter weight construction, the economic advantages over concrete are self evident. The key to the system is the CSR Gyprock© Resilient Mount, a unique component which isolates the Gyprock© plasterboard ceiling from the supporting timber structure. This significantly reduces the amount of impact noise, speech and low frequently sounds from home entertainment systems filtering through to people living above or below.

Vertical fire protection is provided by the two layers of 16mm Gyprock Fyrchek©, as required by building regulations where the floor/ceiling separates different tenancies.

CSR Gyprock© High Performance
Ceiling System is ideal for use in:
 
Two and three storey walk-up units.
Apartment buildings.
Motels.
Luxury, double storey homes.
Dual occupancy domestic dwellings.

Features:

Sound Transmission Class (STC) 57*
CSIRO Highett Test No. TLA 321.
 
Impact Insulation Class (IIC) 70
CSIRO Highett Test No. TLI 321.
 
Fire Resistance Level (FRL) 60/60/60
Including Resistance to Incipient Spread of Fire. CSIRO North Ryde Test SI 99.

* NOTE: These vertical chambers are not structurally isolated. The result, therefore, is representative of an actual installation rather than a laboratory result.

Mounting the attack against noise

At the heart of the high performance system is a remarkably simple component. The CSR Gyprock© Resilient Mount (patent pending). The mount is a proprietary component used for fastening a plasterboard ceiling to the underside of a timber floor, while simultaneously isolating it from structure borne vibration.

The mount is designed to achieve maximum isolation when loaded to approximately 12kg per mount. For other acoustic, non-fire rated configurations, different combinations of plasterboard or furring channel and mount spacings can be used to achieve a loading of 12kg per mount.

Perimeter details

At all wall/ceiling junctions, the perimeter gaps must be completed as shown in the following diagrams.

Installing the ceiling system

Under a timber floor with joists at 450mm centres, CSR Gyprock© Resilient Mounts are attached to every second joist using 60mm x No. 8 CSR Gyprock© screws. The mounts are arranged in rows 600mm apart along each joist. All mounts supporting furring channels that run parallel and adjacent to walls should be kept 100mm away from the wall. Attach Rondo Part No. 294 wall angle, with the acoustic foam strip adhered to lower face, to all perimeter walls. This angle should be positioned so as the plasterboard is installed, the foam is lightly compressed.

Snap Rondo Part No. 129 furring channels into the CSR Gyprock© Resilient Mounts leaving channel ends 50mm clear of the walls they abut.

Screw-fix two layers of 16mm Gyprock Fyrchek© into position using 25mm CSR Gyprock© for the first layer, and 45mm CSR Gyprock© screws for the second layer. Leave a 10mm gap at all perimeters.

For fire rated applications, CSR Gyprock© Fyrchek must be installed strictly in accordance with CSR Gyprock© Brochure No. 536. All recessed edge and butt joints in the second layer must be staggered from those in the first layer.

Joint treatment. Tape and set joints of the final layer with BASE COAT 100/120 jointing system or vinyl-based jointing cement and paper tape.

 

                 
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