All raw materials are accompanied by their respective conformity certificates, with details of the tests carried out: chemical composition, mechanical properties, dimensions, etc. Pieces are generally made of S275 (F2430) and S355 (Fe510) steel, from properly selected suppliers, approved by our quality department.




Anti-Corrosion Protection and Surface treatment

The anti-corrosion protection applied to the metal structure is decided at the appropriate time during the design process, depending on the conditions of the area where the building will be constructed.

The treatment and finishing scheme will be designed to correspond with many different types of environments and the necessary life of the structure.


Category External Internal
C1 Very low Buildings with heating and clean atmospheres
C2 Low Atmospheres with low contamination level. Rural areas Buildings without heating, possible condensation
C3 Average Urban and industrial atmospheres with moderate Sulphur dioxide pollution. Coastal areas with low salt levels Warehouses with high humidity and some contamination
C4 High Industrial areas with coastal areas with moderate salt levels Chemical industries, swimming pools
C5 Very high (industrial) Industrial areas with high humidity and moderate salt levels Buildings with almost constant condensation and high contamination
C5-M Very High (sea) Coastal or sea areas with high salt levels Buildings with almost constant condensation and high contamination



Designing painting plans for passive fire protection, in accordance with safety regulations concerning fire, defining the intended resistance to fire level (R30, R60 or R90), the section factor of the metal structures to be protected and the critical (or collapse) temperature of the structure (to be defined by the project designer). The section factor links the area to be painted with the steel volume of the structure.


The materials used in our metal structures are measured, cut, perforated and marked using automated production lines, linked by transport systems. This equipment is linked to and programmed directly from the project planning room, minimizing the chances for human error and ensuring high levels of reliability and size conformity.



The colors used in final finishes, in acrylic or polyurethane paints, are chosen by the client, in accordance with the available RAL color chart.