Profiled sheets - the optimum vs the oft used

Abstract

Profiled sheets are used extensively in roofing, cladding, sheet piling and containments. Profile development is increasingly rapidly owing to advancement in materials and construction technology. The resistance to longitudinal bending is proportional to the depth and thickness and depends greatly on the profile itself. The strength of the profiled sheet in longitudinal bending is proportional to the depth of corrugation, thickness and on the profile itself. More often than not profiles are repetitive and most popular being of the sine wave form. Hence it may be assumed that if a quarter of the best form is determined, the most optimum profile is known. It is calculated that the strength/unit length of the most widely used sine wave form is in agreement with the best profile suggested by the calculus of variations.