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Nowadays, steel constructions and their elements are used for their properties. One of their advantages is, for example, their low weight in comparison with their load capacity. Also, quick assembly is one of their advantages. On the other hand, there are disadvantages which are associated with changes of properties under thermal stress. There are no significant changes up to a temperature of 350°C, but steel loses their load capacity between 500-700 °C [1], [2]. Because of that, in many cases these constructions ...

Steel constructions and their structural elements are significantly vulnerable to high temperatures which may be caused, for example, by fire. For this reason, investigations of the thermal load of building structures bear indisputable social importance and considerable practical coverage in the security design of critical infrastructures, as well as in the protection of persons and members of intervening security forces. The application of new knowledge when dealing with emergency situations and investigating the...