The article describes the evaluation of the optimal engineering solution for monolithic reinforced concrete swimming pool (one of the most durable swimming pools). There are three alternatives for constructing an indoor swimming pool. The three swimming pool construction alternatives differ by flashing and finishing technologies. Three alternative options are analysed in order to find the optimal building technology alternative for the construction of indoor swimming pool: pairwise comparison method (only subjective significance is determined), the cross-entropy method, and expert method. The most rational (optimal) technological solution for the construction of the swimming pool was selected by means of multiple-criteria decision analysis. The closeness to the ideal point method and efficiency value method were applied. The optimal alternative was found by means of weighted sums. The swimming pool construction price in EUR/m2 was the most important evaluation criterion in the selection of the optimal swimming pool building technology alternative. The results obtained by means of two multiple-criteria analysis methods were different; therefore the weighted sum model was applied. The best alternative for the construction of indoor swimming pool was as follows: concrete reinforced with 300 mm bars, waterproofing tape BT2025S and 1.5 mm thick reinforced waterproofing finishing film.
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