Manufacturing technology

In 2016, the company Termetal started production on steel gratings and pressed steps using a modern automatic production line. In this way, the company is capable of providing comprehensive services to its business partners and choosing appropriate products to meet the market needs.
The grating is manufactured in accordance with a technical approval issued by the Building Research Institute and also with standards DIN 24357, DIN 24531 and RAL GZ638.
Pressed gratings consist of bearer flat bars and transverse flat bars. They are manufactured by slotting bearer flat bars and pressing transverse flat bars into them at a pressure of up to 800 tons.

This manufacturing method of gratings ensures an equal and precise distribution of squares, which, in turn, ensures the high aesthetics of craftsmanship. Combining bearer bars with transverse bars in the pressing process makes the grating surface very stable.

Gratings of this type can be used as:

  • pedestrian footbridges inside industrial and warehousing facilities,
  • covering for sewers and protection of manholes,
  • covering for footpaths on bridges and walkways,
  • elements of internal and external façades of buildings.

In recent years, an increase has also been observed in grate application as decorative and ornamental elements.


Pressed and welded gratings are made of S235 steel in accordance with PN –EN 10025:2007. If a cold-rolled bar is used, a wire rod of S235 steel and similar types is used.

Pressed gratings can be also made of INOX 304 and INOX 316 stainless steel.

Anti-corrosion protection

At the client’s request, grates are protected against corrosion by hot-dip galvanizing, according to PN EN ISO 1461:2011 at the two galvanizing plants of the Termetal Group in Piła and Grudziądz. The minimal thickness of the zinc coating for elements up to 3mm thick is no less than 45µm and 55µm for elements 3 – 5mm thick.

Gratings can be also made without any anti-corrosion coating if the client reports such a need, e.g. further processing.