Three methods for the calculation of equivalent fire duration were analyzed. These are the methods of the standards EN 1991-1-2, GOST R 12.3.047-2012 and the methods based on fire modeling by FDS 6. Various rooms and their structures (concrete, non-protected and fire-proofed steel), and fire sources were considered. It was found that the GOST R 12.3.047-2012 method gives higher values of equivalent fire duration in comparison with the EN 1991-1-2 and FDS 6 methods. Not only the equivalent fire duration, but also actual fire resistance limits were evaluated by FDS 6 taking into account the heating of structures. It was shown that FDS 6 can be successfully used in cases when the standards are not applicable or give overestimated results.

International Seminar on Fire and Explosion Hazards (9; 2019; Saint Petersburg, Russia). Proceedings of the Ninth International Seminar on Fire and Explosion Hazards [Электронный ресурс]: 21-26 April 2019, Saint Petersburg, Russia. Vol. 1 / Peter the Great St. Petersburg Polytechnic University, Autonomous Non-Profit Organization "Fire and Explosion Safety", Gefest Holding Ltd ; [edited by A. Snegirev [et al.]. — Электрон. текстовые дан. (1 файл : 118 Мб). — Saint Petersburg, 2019. — Загл. с титул. экрана. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Adobe Acrobat Reader 7.0. — <URL:http://elib.spbstu.ru/dl/2/k19-45.pdf>. — <URL:http://doi.org/10.18720/SPBPU/2/k19-45>.