I and T Sections

These sections are named based on their shapes (Fig. 24.1(c) and (d)). I-section is usually referred to as rolled steel joist (RSJ) or beam. RSJs are used for floor beams, lintels, columns, etc. T-sections are used in steel roof trusses, in built-up sections, in steel water tanks and in chimneys and bridges. The economic use of material is derived by concentrating the material on the flanges where the bending stresses are maximum.