The purpose of the thesis was to analyse the structure of the composite slab with profiled sheets as permanent formwork; to work with Russian building norms and carry out the limit state design in order to determine characteristics of the structure and find out if it can be used in residential buildings. The study was commissioned by engineers of company Ruukki rus as they are willing to expand their market from designing industrial buildings to residential apartments. An excel file was created with an intention to suggest constructors a useful tool for the implementation of limit state design of the structure. The results of the study show that the slab can be successfully used for residential buildings as it meets all the requirements and demands fewer materials.