As the scope of Tekfen, structural steels of process modules for P58 and P62 FPSO Platforms to be installed at Parque das Baleias and Roncador Offshore Oil Fields in Brazil, have been fabricated. Deck segments fabricated in Ceyhan Steel Factory, have been transported to Iskenderun Port by means of special vehicles, and their assembly have been performed over there at the port. Totally, 14 process modules, of 4.000 tons in weight, have been fabricated and handed over to customer within the scheduled time. The Weight of the completed modules changes between 174 and 400 tons. Dimensions of the biggest module was; W: 30,6 x L: 22,7 x H: 6,2 m, and the weight was 400 tons.