Galvanised SPIROsol pipes are installed under the road to Teichalm, Sommeralm, Brandlucken, Heilbrunn near Haslau bei Birkfeld. The road through the mountains to these villages has been enlarged to allow more traffic. SPIROsol pipes are used to dewater the mountain road. Instead of concrete SPIROsol pipes are used in mountaineous areas because they are light weight, strong and durable. Thanks to the corrugation it also works as a hydrobrake. Do you have a question about this product, please contact us and we are happy to help you.