Design-Chart for Steel Beam with Load & Resistance Factor Method using the Thailand Sections

Abstract

Steel beam design generally has many stages: checking the type of cross-section, determine the nominal flexural strength of cross-sections which depends on yielding, lateral-torsional buckling, as well as local buckling of cross-sections. There are many formulas based on cross-section type. To solve the problems that concern on a long determination process, waste the time, and error of calculation. This article presents the design charts of steel beams according to the load and resistance factor design (LRFD) based on the design standards of the Engineering Authority of Thailand. For the most popular W, C, and HSS steel crosssections available in Thailand according to TIS standards. This article will only develop graphs for compact sections. The results of this study were to obtain the design-charts of the relationship between the unbraced length and the design flexural strength.