## 5 Conclusions  
This paper presents the results of tests on solid timber beams reinforced with basalt fiber-reinforced polymer (BFRP) bars. The reinforcement was glued into the section using an epoxy resin-based adhesive. The analysis examined the load-carrying capacity of the beams and their flexural strength, deflection, ductility, and failure form. This study showed that the applied reinforcement improved the strength parameters of the structure, thus confirming the validity of its execution. The summary is as follows:  
1. Reinforcement in the form of two 8 mm diameter basalt bars placed in the tension zone resulted in an 8.41% increase in the beam's load-bearing capacity. In the reinforced beams, greater deflection was observed and increased by 19.77% on average. The test time (to failure of the element) in reinforced beams increased slightly.
2. When analyzing the load capacity, the scatter of results for reinforced beams was smaller than for unreinforced beams. The opposite situation was true for analyzing the ductility of the timber elements.
3. The largest percentage increase in ductility values was observed for the index based on the ratio of deflection values of reinforced to unreinforced beams. This value almost doubled. The other ductility indices increased by between 14% and 24%.
4. The damage was influenced by tension and compression effects. In B-series beams, the reinforcement failed, with bar extraction and bond spalling. This is typical for this type of test and material.  
Figure 11: Main assumptions for numerical analysis: (**a**) axonometric view; (**b**) cross-section of reinforced beam.  
Figure 12: Numerical versus experimental curves: (**a**) unreinforced beams; (**b**) reinforced beams.  
It can be concluded that reinforcing timber beams with basalt bars is a promising way of strengthening solid timber beams. However, further research is necessary to make the use of reinforcements more effective. Considering the research so far has only been carried out on ten beams, testing a larger number of specimens would provide greater homogeneity in the results obtained. Due to the limitation of the number of elements tested, it would be beneficial to conduct a numerical analysis of the tested reinforcement.  
To improve the parameters obtained, tests can be carried out using a larger bar diameter. The use of hybrid reinforcement is worth considering. The use of a composite sheet could prevent rod separation [38]. The authors are currently conducting further research into both of these methods for enhancing the effectiveness of the reinforcement.  
Conceptualization, P.G.K. and M.M.B.; methodology, P.G.K. and M.M.B.; formal analysis, M.M.B. and J.D.; investigation, M.M.B. and J.D.; data curation, M.M.B. and J.D.; writing--original draft preparation, J.D.; writing--review and editing, P.G.K., M.M.B. and J.D.; supervision, P.G.K. and M.M.B.; funding acquisition, P.G.K. All authors have read and agreed to the published version of the manuscript.  
The tests were implemented thanks to the financial support of the Kielce University of Technology within the framework of the statutory work No. 02.0.20.00/1.02.001, SUBB. BKTK. 24.002.  
Not applicable.  
The original contributions presented in the study are included in the article, further inquiries can be directed to the corresponding author.  
The authors would like to thank [PERSON] and [PERSON] for their help in carrying out the experimental research.  
The authors declare no conflicts of interest.