The facing of tunnel walls must meet stringent requirements. Only the most durable materials produced by modern manufacturing techniques can resist the aggressive environment of vehicular tunnels and the frequent cleaning they require.
GLASAL NT has been used succesfully as a tunnel lining panel worldwide for over 25 years. Its physical and aesthetic properties have gained acceptance in the most technically demanding markets.
GLASAL NT is preferred as a tunnel lining because of its many advantages : non-combustility, attractive colour range, freedom from corrosion, ease of maintenance and its non-toxidity in the event of fire.
GLASAL NT has excellent optical properties which allow perfect diffusion of light and completely eliminate the risk of glare or dazzle. Economical lighting is also possible because GLASAL NT's light colours reflect up to 87% of light rays.
If the tunnel has a circular section GLASAL sheets are mounted on horizontal aluminium profiles. The GLASAL panel itself is curved on site during installation. The thickness of the panel depends upon the radius of the tunnel. The fixing system allows a very high output and efficiency as well as easy access to the primary tunnel wall.
In case of specific fire regulations a combination is made of GLASAL and PROMATECT. In this case vertical galvanized steel profiles are used instead of aluminium. Fixing is done in the joints between 2 panels by means of stainless steel screws and washers which match the colour of the GLASAL lining.
If there are no specific requirements for fire protection,
GLASAL panels are used with Astro Rivets fixed to the panel.
The supporting structure consists of vertical galvanized
steel profiles in which horizontal U-channel are inserted
: for this purpose regular cut-outs are made in the vertical