The first part of the thesis presents the problems of reinforced concrete structures in case of fire (e.g., explosive spalling) and how these problems can be solved with fire protection. The second part of the thesis is devoted to the presentation of the SIST EN 13381-3 standard, which is intended for testing the effectiveness of such protections in fire furnaces and prescribes the method of implementation and the minimum number of necessary tests. In addition to the minimum number of tests, the standard also suggests optional additional fire tests, but does not indicate what advantages this could mean for the client (usually the manufacturer of the tested fire protection). The last part of the thesis tries to answer this question. The difference between the fire resistance of an AB board, calculated based on less accurate data on fire protection, versus the fire resistance obtained by calculation with more accurate data of fire protection is demonstrated on a specific selected example.
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