The panels are made of two cold-formed aluminium alloy sheets, the assembly of which is guaranteed by the apposite bayonet joint with the aim of avoiding the use of screws. The cold-formed folded plate structure, with the function of bearing the soundabsorbing padding, has the standard dimensions equal to 2960 x 500 x 105 mm, painted or pre-painted with weather-resistant polyester resin.

The function of lowering the noise level with the aims of obtaining the best soundproofing characteristics in correspondence to the sources of the most disturbing noises is guaranteed by a panel in mineral f bres located centrally with respects to the folded plate structure, with a thickness of 60 mm and a density of 90/100 kg/m3. In the exposed part near the perforation, this panel will be supported by varnished f breglass which is water- resistant, siliconed so as to allow resistance and to withstand adverse weather conditions and ultra-violet rays. The front shell will necessarily be perforated with a full/empty ratio cual to about 33% of the surface, 10 mm diameter and 14 mm pitch, in order to enhance the soundabsorbent characteristics of the insert, whilst the rear shell will be made of a solid wall with the aim of creating an anti-noise barrier. The two shells are closed by means of the appropriate heading in polypropylene which ensures durability and resistance to extreme temperatures and adverse weather conditions; furthermore, a rubber sea¡ is fitted to the headings so as to obtain the utmost air-tightness between the panel and the bearing structure of the barrier itself.

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Apart from an adequate degree of sound absorption, the aluminium wall guarantees:

• no firespreading;
• resistance to adverse weather conditions;
• resistance to strong winds;
• simple construction;
• its aesthetic aspect integrates with the surrounding environment;
• the possibility of integration by means of severa¡ types of panel (e.g. wooden, PMMA);
• a wide range of colours for the external finishing;
• different thicknesses of the cold-formed sheeting

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The anti-noise barriers can be used so as to limit the sound propagation towards the residential estates in case of:

• Main and secondary road infrastructures;
• Railway infrastructures;
• Industrial areas;
• Noisy plants situated externally.

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The use of one type of barrier does not exclude the use of another..

All products permit good levels of acoustic isolation/absorption, by means of a careful and punctual evaluation of the environmental conditions and a relative choice of the most suitable materials.

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Great attention is paid to the respect for the environment. Creates elements with pre-treated materials in conformity with the European Regulations in force.

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The singular panels which are to be assembled in lightweight modules are easily inserted between the upright posts in variable height, HE profiles which have been galvanised with thermosetting powders and are complete with fixing plates.

The assembly and the subsequent maintenance result as being extremely easy to carry out thanks to the simple modular knuckle join system.

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