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| London
Underground |
4-Rail
Report |
To Specify
Bonded aggregate tile.
Size 500mm x 500mm x 28mm as standard. Colour as per standard chart R.A.L.
Fixing by either stainless steel screw/bolt or nail. Finish to be a smooth
appearance, fixing holes to be grouted with manufacturers approved material.
Acoustic Performance
a)
Sound Absorption Characteristics
Test Procedure BS 3638:1963
Test Conducted by The University of Salford
| |
octave
band centre frequency Hz |
| Fixed
Parameters |
NRC* |
125 |
250 |
500 |
1000 |
2000 |
4000 |
| a)
no air gap |
0.56 |
0.05 |
0.14 |
0.38 |
0.76 |
0.98 |
0.90 |
| b)
50mm air gap |
0.77 |
0.13 |
0.48 |
0.83 |
0.90 |
0.88 |
1.08 |
| c)
50mm air gap plus wool fibre packing |
0.93 |
0.36 |
0.79 |
0.97 |
0.97 |
0.99 |
1.10 |
| d)
100mm air gap |
0.82 |
0.35 |
0.76 |
0.91 |
0.78 |
0.83 |
1.05 |
b)
Sound Insulation Characteristics
Average 3150Hz 46.1db
| Hz |
63 |
125 |
250 |
500 |
1000 |
2000 |
4000 |
Sound
Reduction Index |
27.2 |
33.4 |
38.1 |
43.2 |
52.1 |
57.6 |
64.1 |
Above
figures based on 28mm QuietStone with 12mm backface of Carlite plaster
Thermal Conductivity
K Value: 424 x 10³ W/m²/°C
Fire Safety
Surface Spread of Flame (BS476 pt7 1971): Class 1
Flame Propagation (BS476 pt6 & pt7 1968): Class 0
Smoke emissions and Toxic fume meet requirements of Engineering standard
E1042.
Load-Bearing
Properties
Density: 1,600 kg/m³
Compression Strength: 10.5 x 103kN/m²
Compression Module: 3.4 x 106kN/m²
Fitting
Instructions can be found HERE
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