Structural Design is the science of ensuring stability, strength, and rigidity of structures so that resist all applied loads without failure. This discipline is concerned with designing a physical structure in such a way that the load-bearing members (such as beams and columns in the case of a building) of the structure support each other in sharing the load or stress.
Structural Design is a part of civil engineering. A great deal of what structural designers do involves designing structures such as buildings, bridges, and tunnels. The primary tasks of a structural designer include: Analyzing configurations of the basic structural components; calculating the pressures, stresses, and strains that each component is likely to experience; considering the strength of various materials, e.g. concrete, steel, and brick to be used to create the structures; making drawings, specifications and computer models of structures for building contractors and using CAD.