The radius of the bending is tailor-made to meet each project’s demands. The construction of the tunnel represents a demanding interdisciplinary construction procedure, with very specific construction materials and products.

The lattice girder can provide immediate support for tunneling environments. Lattice tunnel substructures are made of ribbed concrete steel of quality B500B/B500C with three or four load-bearing longitudinal bars that are connected by spatial diagonals by suitable welding. One tunnel arch is made of several segments (most often five), and the connection is realized with screws or pipes.

Diorit can manufacture all types of lattice tunnel substructures according to all customer specifications and designs. Grid tunnel substructures have been tested and successfully installed in many tunnels in Bosnia and Herzegovina, in the region and EU.

In addition to its own quality control, Diorit d.o.o. leads the institutional control of steel products in all relevant institutes for the domestic and EU market. We are constantly working on improving the quality of its products. It uses modern technologies, modern machinery and new construction materials to provide its customers with high-quality and relatively low investment construction costs.

Some of the many advantages are:

• quick installation with the participation of a small number of people
• there is no need to invest in special equipment
• acts as a current ceiling support over the excavated section
• acts as a template, providing a minimum layer of shotcrete
• saving in material, time and money