Performance Evaluation of Pre-Engineered Building with Different Slopes

Abstract

Pre–engineered buildings (PEBs) are increasingly preferred in industrial, commercial, and storage applications due to their cost–effectiveness, reduced construction time and structural efficiency. The roof slope is a critical design parameter influencing structural performance, material consumption, drainage and overall stability. This study evaluates the structural performance of PEB frames with varying roof slopes of 1 in 10, 1 in 15 and 1 in 20 under different loading conditions as per IS 800:2007 and IS 875 guidelines. A 48 m span, 8 m eave height steel frame is modeled in STAAD Pro V8i with tapered sections to assess parameters such as maximum deflections, axial force distribution, bending moments and weight optimization. Comparative results indicate that increasing slope improves drainage efficiency and reduces horizontal thrust, but it may lead to a marginal increase in steel consumption. The findings provide valuable insights for selecting optimal roof slopes in PEB design, balancing structural performance and economy.