Structural steel is a category of steel used as a construction material for making structural steel shapes. A structural steel shape is a profile, formed with a specific cross section and following certain standards for chemical composition and mechanical properties. Structural steel shapes, sizes, composition, strengths, storage practices, etc., are regulated by standards in most industrialized countries.
Steel structure involves sub-structure or members in a building made from structural steel. Structural steel is steel construction material which fabricated with a specific shape and chemical composition to suit a project’s applicable specifications.