The aim of this project is to increase the competitiveness of stainless steel in buildings by developing an integral and holistic approach for the application of stainless steel elements in composite structures. The project will first address the requirements for the design of stainless steel composite structures and to provide a holistic design approach with planned composite action between the steel profiles and the concrete elements, considering all the technical aspects. The project will consist of new experimental studies to identify the different modes of behaviour and failure of the system. Supplemented by extensive numerical simulations, this project will develop thorough understanding of the structural performance of the stainless steel composite structures to develop practical design methods. Proposed design rules will be based on adaptation of the current design principles and rules in the Eurocodes.