Are rectilinear self-supporting roofs consisting of the juxtaposition of the plating upon the lateral overlay. Under normal conditions, they can extend to 11m hollow, without intermediate support structures.
To simplify, it could be said that they work as straight lintels. In this type, the rigidity only comes from the section and they are used to save not very big lights.
Wind Turbine Extractors
Ingeniero Ruiz de la Cuesta, Nave 7,
Polígono Industrial Las Salinas de Levante
11500 El Puerto de Santa María, Cádiz, Spain.