Steel constructions are widely applied, due to the relatively short construction time. In the reconstructions of buildings, steel constructions provide the advantage that larger openings can be created in existing (bearing) walls, without the beams taking up too much space (height) and the construction is relatively light and quickly executed And can be loaded quickly. The steel constructions are calculated in accordance with the Eurocode. With regard to public buildings, the steel structure should be protected against fires. To take the correct measures, we also advise our clients so that the calculated constructions meet the requested fire safety.