In order to ensure the durability and safety of the structure, it must be designed and constructed to withstand all the actions that may affect it. According to probability of action, fire belongs into a group of extremely action, actions whose probability of appearance is relatively small. Despite of small probability, fire represents huge danger to the stability and bearing capacity of the structure, but also for the people. This paper tries to give an answer to the question how much is actually a timber resistant on influence of fire and to confirm its good mechanical and physical properties in case of fire. The aim of this paper was to determine fire resistance for the primary and secondary elements of sports hall roof structure. Paper is consisted of a theoretical and practical part. In the theoretical part, readers are introduced to fire nature, but the characteristics of timber in fire are also briefly described. Furthermore, recommendations and protection measures are shown to stop fire spreading and fire flashovering. The paper also summarizes the concept of calculation of fire resistance for timber construction according to Eurocode 5 (EN 1995-1-2). Before the practical part, glued laminated beams are briefly described with their advantages and disadvantages. A sadlle glued laminated beam with curved intrados is presented, which is used in the second part of this paper. The practital part of the paper contains a detailed analysis of the sports hall roof structure. Moreover, the calculation of fire resistance for main and secondary elements for the given construction is conducted.