raised floors - Butech

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The correction factors in dB, which are necessary to obtain the corresponding data for 38M1A panels and 30SA are shown in the table below.
Type of coating factor [dB]
calcium sulfate 30S -2
chipboard 38M1 -1
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 factor [dB]
Steel (F) -1
Ex.1: Panel 38M1A + tile with stringers M
1. In diagram 1 the data in relation to the panel 38M1 with stringers M obtained are = 23 dB;
2. From Table 1 is extracted correction factor for the coating of tiles (T), which is - 2dB. The reduction of vertical impact noise (ALw) is, therefore, = 23-2 =
21dB.
Ex.2: Panel 30SF + vinyl with stringers P
1. In diagram 1 the data in relation to the panel with stringers 35SA with stringers P obtained are P = 25 dB;
2. From Table 1 is extracted the correction factor for the coating on vinyl (V), which is + 2dB;
3. From Table 2 is extracted the correction factor for the panel 30S starting at 35S, which is-2dB;
4. From Table 3 is extracted the correction factor of the lower cover of steel, that is-1dB. Therefore, the reduction of vertical impact noise (ALw) is = 25+
2-2-1 = 24dB.
Ex.4: Panel 38M1A + parquet with stringers M and acoustic insulation sheet NO stuck
1. In diagram 1 the difference between data in relation to the panel 38M1 with stringers M and P obtained are = 23-25 =-2dB;
2. In diagram 1 the data concerning the panel 38M1 and acoustic structure P and with acoustic insulation sheet NO stuck obtained are = 34dB;
3. Now the data obtained in relation with the panel 38M1 with structure M and with acoustic insulation sheet NO stuck is as follows: 34-2 = 32 dB;
4. From Table 1 is extracted correction factor for coating parquet (P) is + 1dB. Therefore, the reduction of vertical impact noise (ALW) is = 32 + 1 = 33dB.
NOTA:
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 perimeter adhesive seal was placed on the edge of the tile 25x25mm;
• The supports were stuck in compliance with appropriate regulations for the slab;
• When using the acoustic insulation sheet having a thickness of 5mm.
• 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.