Explain Rolled steel sections?

Steel sections of standard size, shapes, & length are rolled in steel mills. The various sections which are manufactured are beam sections, columns sections,  channel sections,  angle sections, tee section, tubular sections, and flat section. These are also called the indian standard sections if they are produced as per their standard dimensions. Sectional properties like sections modulus,moments of inertia and radius of gyration depend on the distribution of steel between the flange and web for given depth of section.