Mirela Popa, Andrei-Cristian Panchici
DOI: 10.2478/ouacsce-2025-0012
Pages: 115 – 124
Abstract – Starting with May 2025, a new version of the Regulations on fire safety of constructions, P118-1/2025, must be applied and P118-1/1999 ceases to apply. From the comparison of the two versions of the standard, it results that in the new version higher fire resistances are required for the beams. The paper compares the thicknesses necessary to ensure fire protection in accordance with the requirements of the two regulations, using the fastest method in current practice, but which at the same time is conservative. Also, the critical temperatures for the most vulnerable elements of the lateral resisting system were determined by iterative calculation for two structures with the same conformity, but which are designed for a different level of seismic hazard. Thus, the fire resistance reserves that are obtained by adopting fire protection thicknesses corresponding to a critical temperature usually considered to be 500oC were estimated.
Keywords – critical temperature, fire resistance, fire stability level, , thickness of the protective layer.
