Abstract
Pre-Engineered Building which has been gaining popularity over the past few years employs builtup sections for members as against hot rolled steel sections. The members’ section profiles match closely with the bending moment diagram across the frames as the depth of the sections is greatly dependant on the moment across the sections and hence we see tapered section profiles in such building systems. A detailed study is carried out on the final optimized section profiles and the analysis results for the present paper. As a part of research paper “Comparitive Study of Pre-Engineered Building and Truss Arrangement Building for varying spans”, models of industrial pitched roof steel building which were designed as both Pre-Engineered building system and conventional steel truss building system were analyzed and designed for dead loads, live loads and lateral load. The study focuses on the variation of member strength with respect to its dimensions,optimized section profile characteristics for a certain critical load combination and ways to reduce member forces by floating columns, lateral bracings etc
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