In todays world the construction the of the structures is going at a very rapid rate. To fulfill the demands of the industry we are relying more on the steel structures as they provide more room for access that is more clear distance for the objects to move. Thus, these structure should be designed safely and economically so that there is no obstacle that can hamper the normal production line in coming future.The steel structure are designed on the basis of the Indian standard codes (I.S) Codes.While designing the steel sections we prefer the codes but the codes are silent about the impact of the connections flexibility on the performance of the structure. The code is also silent about the time period values that needs to be taken while designing the structure for the different types of the connections.Thus, in this report we have modelled various steel structure with and without bracing to find out the response of the steel structure under these conditions. The karvasilis approach was followed to find the various parameters of designing the structure and thus the response databank was prepared for the semi rigid, rigid and flexible type of connections. The multiple linear regression analysis were performed on the response databank and the equations for time period and behaviour factor plus other parameters were formed. This helps in designing the structure more economically and safely with the implementation of these new equations.