TY JOUR TI FEATURES OF ASSESSING THE FIRE RESISTANCE LIMIT OF LOAD-BEARING STRUCTURES KW fire resistance KW supporting structures KW fire KW modeling KW safety JO MONITORING AND EXPERTISE IN SAFETY SYSTEM AU Guzhva, A.A. AU Sidorova, E.N. PY 2025 IS PB Saint-Petersburg University of State Fire Service of Emercom of Russia