Study of Economic Aspects of Cold-Formed Steel over Hot Rolled Steel for Purlins

One of the great advantages of cold-formed steel (CFS) is the immense flexibility that the material affords in forming cross-sections. This flexibility would seem to readily lend itself to optimization of member cross-section shapes. Cold formed sections also having the great flexibility of cross-sectional profiles and sizes available to structural steel designers. Whereas, the low strength-to-weight ratio of hot rolled steel members leads to increase in overall load on structure as compared with cold-formed steel sections which is having high strength-to-weight ratio. In this paper focus is given on study of economic aspects of cold formed sections as purlins in comparison with traditionally used hot rolled sections for Industrial structures by using IS 800-1984 & IS 800-2007 with IS 801-1975. The most economical sections and cost comparison is presented in the paper for 5m, 6m and 8m spans with roof slopes of 10 0 , 15 0 and 20 0 . Similarly focus is given on the effect of sag rods in the design of