Analysis of Truss System for Industrial Structure

In a developing country like India, the capital outlay under each Five-Year Plan towards setting up of industries and consequently construction of industrial buildings is very high. It is, therefore, necessary that the various parameters of industrial buildings be standardized on broad norms so that it would be feasible to easily adopt prefabricated members, particularly where repetitive structure could be used. In the present work, a total of ten pitched roof trusses are compared. The analysis and design results of steel roof trusses are presented for a span of 12 m and 6 m spacing between them. The truss configurations used are Double Howe, Double Fink, Fan, Fink, Pratt, Queen post, Fink-2, Multi panel, Attic and Piggyback. The slope of roof truss provided is 180 which is generally recommended as this may not pose any fabrication problem. The analysis of roof truss is done for wind zones I to VI. The analysis and design have been done based on the relevant Indian standards. Box sections are used in trusses. A comparison of axial force, shear force in members and weight and cost are made. Also, axial and shear force on these trusses is compared. The result shows that the Pratt truss is more economical than other trusses considered. On the other hand, Fink-2 type truss is costlier and has more weight than other trusses.