In this thesis the resistance of bolted connections of IPE profiles with extended end plates were analysed by the component method. This thesis begins with the presentation of required design checks for the design of bolted column-to-beam connection. There are 15 checks for his kind of connection. The analysis of beam-to-beam connection is presented after that. There are only 4 design checks for determining the resistance of this kind of connection, namely the end plate in bending, the beam web in transverse tension, the beam flange in transverse compression. The second part of thesis represents the design procedure for the calculation of beam-to-beam connection with the example. The results of the analysed connections with different beam sizes, steel grades and number of bolts are represented in tables in Appendix C.