Abstract
The invention relates to a drywall construction system comprising a plurality of metal profiles which at least on one side are panelled using dry construction boards. At least on this one side spring rails are arranged between the metal profiles and the dry construction boards. The invention is suitable, in particular, for improving sound insulation in lightweight steel constructions.
Claims
1. A drywall construction system comprising a plurality of metal profiles, which are panelled at least on one side with dry construction boards, characterised in that the spring rails are arranged at least on this one side between the metal profiles and the dry construction boards.
2. The drywall construction system according to claim 1, wherein the metal profiles (lightweight steel profiles) have a sheet thickness between min. 1 mm and max. 3 mm, preferably higher than 1.5 mm.
3. The drywall construction system according to claim 1, wherein the profiles are spring profiles with a sheet thickness between 0.4 mm and 1 mm.
4. The drywall construction system according claim 1, wherein the spring rail is a top-hat rail.
5. The drywall construction system according to claim 1, wherein the spring rail has recesses in the metal, at least in parts thereof.
6. The drywall construction system according to claim 1, wherein the metal profiles are panelled on both sides.
7. The drywall construction system according to claim 1, wherein spring rails are arranged perpendicularly to the metal profiles.
8. The drywall construction system according to claim 1, wherein the spring rails are fastened to the metal profiles.
9. The drywall construction system according claim 1, wherein dry construction boards are fixed to the spring rails, not to the metal profiles.
10. The drywall construction system according claim 1, wherein a cavity enclosed by the spring rails is filled with an insulation material.
11. The drywall construction system according to claim 1, wherein up to 80% by volume of a cavity between the dry construction boards and the profiles is filled with an insulation material.
Description
[0022] The invention will now be described in more detail by way of an exemplary embodiment, in which:
[0023] FIG. 1A shows an airborne sound reduction index in dependence of the frequency for various drywall construction systems
[0024] FIG. 1B shows a schematic cross-section through a drywall construction system according to the invention
[0025] FIG. 1C shows a schematic cross-section through a commonly used drywall construction system with sound insulation properties
[0026] FIG. 1D shows a schematic cross-section through a drywall construction system built of lightweight steel
[0027] FIG. 2 shows an oblique top view onto a part of a spring rail
[0028] FIG. 3 shows a schematic section through an installed situation according to the invention.
[0029] FIG. 1 shows the sound reduction index R in dependence of the frequency for different drywall construction systems. In FIGS. 1B to 1D the respective drywall construction systems are shown schematically in horizontal section. FIG. 1C shows a commonly used drywall construction system optimised for sound insulation, which consists of metal profiles as commonly used in drywall construction systems with double-sided, two-layer panelling (profiles with a sheet thickness of 0.6 mm). The inner cavity between the metal profiles is filled to 80% by volume with mineral wool. All gypsum plasterboards (raw density >1000 kg/m.sup.3) are screwed directly to the flanges of the metal profiles. The arrows point to the resulting respectively associated sound reduction graph for such a drywall construction system, see graph with circles.
[0030] FIG. 1D shows the same system setup as for the embodiment described for FIG. 1C, but here with lightweight steel profiles comprising a sheet thickness of 1.5 mm. The arrow points to the associated sound reduction graph, see graph with filled triangles. Compared to the sound insulation system of FIG. 1C it becomes clear that the sound insulation properties of the drywall system are diminished due to the use of lightweight steel profiles.
[0031] FIG. 1B shows an embodiment of a drywall construction system according to the invention, which is different from the embodiment shown in FIG. 1D due to the presence of spring rails extending perpendicularly to the metal profiles. The spring rails are arranged between the 1.5 mm thick lightweight steel profiles and the one side, which is panelled. The spring rails are screwed to the metal profiles at the intersecting points, whilst the gypsum plasterboards are screwed solely to the spring rails. The panelling is decoupled from the metal profiles, so that only a very small proportion of the sound energy can actually be transferred via the system to the other side. The arrow points to the sound reduction graph associated with this drywall construction system, see graph with crosses. It is evident that this system is superior especially in the high frequency range even to the sound insulation system shown in FIG. 1C. This also becomes evident when looking at the sound reduction index Rw, which is 66.4 dB for the inventive embodiment, 63.2 dB for the sound insulation variant of FIG. 1C, and only 51.1 dB for the lightweight steel variant without further measures (FIG. 1D). The negative influence of the 1.5 mm lightweight steel profiles upon the sound insulation is not just compensated for by the integration of the spring rails, but distinctly overcompensated for. Such a positive result had not been expected.
[0032] FIGS. 2 and 3 show a possible embodiment of the spring rails in the form of a top-hat profile. In the region of the flanks the spring rail has oval holes which make the rail more elastic. The bevelled flanges also comprise holes which can be used for screwing to the metal profile.
[0033] In FIG. 3 an exemplary installed situation is depicted in longitudinal section. The metal profile 1 has a top-hat rail or spring rail 2 fastened to it with screws via the two flanges 2b. Two construction boards 3, in this case gypsum plasterboards, are fastened with screws in a single layer to the base 2a of the spring rail 2. The screws for fastening the gypsum plasterboards fix the plasterboards to the spring rail 2 only, not to the metal profile 1.
