raised floors - Butech

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The correction factors in dB, which are necessary to obtain the corresponding data for 38M2A panels (of 38M1A) and 30SA (of 35kA) are shown in the
table below.
Type of coating Correction factor [dB]
calcium sulfate 30S -1
Chipboard 38M2 0
Natural stone (S) and reconstructed (R), Ceramic tile (T
Finally, the correction factors in dB are shown below for obtaining panel data with a lower cover in steel instead of aluminum.
Below are some examples of how to get the data for each particular group.
Type of coating Correction factor [dB]
Steel (F) 0
Ex.1: Panel 38M1 + tile on a structure with stringers
1. In diagram 1 the data in relation to the panel 38M1 with stringers obtained are M = 34 dB;
2. From Table 1 is extracted correction factor for the coating of tiles (T), which is - 1dB. The horizontal aerial noise reduction is, therefore, (Dnfw) 34-1 =
33dB
Ex.2: Panel 30SF + vinyl on a structure with stringers P and with acoustic insulation sheet stuck.
1. In diagram 1 the data in relation to the panel 35SA with stringers P obtained are P = 36 dB;
2. From Table 1 is extracted correction factor for the vinyl (V), which is + 1 dB;
3. From Table 2 extracts the correction factor for the panel 30S starting at 35S, which is-1dB;
4. From Table 3 extracts the correction factor in the lower cover in steel, which is 0 dB. Therefore, the reduction of aerial sound horizontal is (D nfw ) 36 +
1-1+ 0 = 36dB.
NOTE: It should be noted that the process of in-situ test was carried out in a modular access floor installed in compliance with current regulations in
place with construction features and standard techniques. In particular, we note the following:
• The slab was cleaned completely and then it was applied an anti-dust product;
• The slab with RAP honeycomb shape of pre-compressed air was perfectly smoothed, with a total thickness of 20 + 5 cm;
• A simple dividing wall was used for testing with a thickness of 100 mm (plasterboard 12.5 mm, stone wool + 40 + plasterboard12.5 mm);
• A perimeter adhesive seal was placed on the edge of the tile 25x25mm;
• The supports were stuck in compliance with appropriate regulations for the slab;
• For the test it was used a sound insulation sheet with a thickness of 5 mm;
• For the test it was used an acoustic partition under the floor sound with the same features of the partition wall.
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