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The ultimate flexural strength of a PSRC composite column can be evaluated by performing a section analysis based on either plastic stresses (i.e., plastic stress method) or strain-induced stresses (i.e., strain-compatibility method); the stresses of the steel angles, reinforcing bars, and concrete are determined by linear strain distribution and the stress-strain relationships of the materials 1 Figure 8 shows the stress distributions at the PSRC cross section by two methods. The pre-fabrication steel structures are widely used in the construction of steel buildings for commercial, industrial and residential purpose in the region of India and also planning to expand globally. Our workshop covers an area of 40,000 square have 8 steel engineering designers, 16 engineering desige and technical personnel,150 senior manufacturing production of steel structure more than 20,000 tons,prefabricated buildings 10,000 square meters per year. In the case of the weld-connected PSRC composite column, the steel cage of angles and transverse reinforcement is moved to construction site, and then concrete form is installed ( Figure 2 ). On the other hand, in the case of the bolt-connected PSRC composite column, concrete form is preattached to the steel cage and it can be permanently used after concrete pouring ( Figure 3 ). Thus, field work related to reinforcing bar placement and concrete form work is excluded, which improves the construction safety and saves the construction time at working in high place. Frontline Roll Forms, our product Prefabricated steel structures provide our client with professional, reliable and accurately designed engineering fabrication of steel buildings ranging from both heavy to light steel structural members. By now it has gained a high position in the construction industry with an enviable reputation because of honest, sincere, reliable and quality services in Roads & Highways, Bridges, regulatory Structures, Land Development, Multi-storied Residential Buildings, Industrial Buildings, Pre-fabricated Buildings, Irrigation and Flood Control Projects. They also said these types of buildings require short time to install and can resist natural disasters better during earthquakes."The demand for pre-fabricated steel structures is rising in the country as it provides safety and needs lesser lead time for building," Newaz Khan, chairman and chief executive officer of the PEB Steel Alliance Ltd, told The Asian Mehedi Ahmed Ansary, professor of Department of Civil Engineering at Bangladesh University of Engineering and Technology (BUET) said "Steel buildings are being popular, due to cost effectiveness".