Disposal of appropriate bridge supporting cunstruction equipment can bring more success in winning buisness. Due to the unstable investments in construction, purchase of equipment can also be a very risky investment for the enterprise. By finding the most suitable supporting structure for a medium-sized Slovenian construction company in the thesis, I examined three types of supporting structures that were used on the bridge over Sora by Zminec. I have examined the supporting structures both from the technological and financial point of view and compared them to each other. After the analysis and comparison I suggested the optimal choice for different types of enterprises.