Civil engineering structures enabling obstacles to be crossed and ensuring that a communication route continues unhindered often have a symbolic value. They are also part of the environment, and are a feature in the landscape. Depending on the layout of the site and the nature of the ground, certain types of feature come to mind: viaduct, cable-stayed bridge, tied arch bridge, but always with variations in shape and material connected with the characteristics of the location and the potential of the construction.

For around thirty years, Greisch office has designed many civil engineering structures on very varied sites. Initially well-versed in the construction of metal bridges, it went on to learn more about the concrete bridges and to design combined civil engineering structures providing the same guarantee over time. Greisch office's versatility enabled it to undertake projects with great freedom, consider their realisation using the industrial capabilities of the day, and to calculate the materials requirements and costs in close liaison with the clients and the contractors to optimize the cost.

The quest for ultimate exactness, simplification and streamlining of the forms, meeting the objectives of economy and top performance, determined Greisch office's strategy while imparting a timeless quality to the civil engineering works that it carried out.