Structural analysis is a tool to analyse any configuration of structure, while structural design is the method design different that particular member for the calculated internal forces.If we consider a crude medical analogy: Doing Structural analysis is somewhat analogous to “diagnosing” and “laboratory testing” of a structure. Structural Design is analogous to “prescribing” medicine to the structure/treating it. A structure is an assembly of elements, like beam elements, column elements etc. It is like the skeleton inside the human body. If you peel off the skin and rip off the flesh you will see a “structure” of the human body consisting of an as Structural ‘analysis’ is calculating the stresses that will act on the building… How much compressive force there is, how much tension, how much bending moment, and so on. Once this information is known, you can then ‘design’ the structure, in other words, specify the properties of the members like foundations, columns, slabs, and so on. In the case of concrete structures - these properties include dimensions of the members, amount and location of steel reinforcement, supported by as much detail as possible and explanatory notes. In the case of steel structures - the properties include dimensions of the I Beams, or angles or channels [whatever the element maybe]; design of welded or bolted connections, together with as much detail and notes you can put. Every object is a structure. Structure is made by connecting various member to make it whole to perform the intended function. Natural structures vary from the very smallest part of an atom to the entire creation of the universe. Man-made structures include buildings, bridges, dams, ships, airplanes, rockets, trains, cars, and even large artistic sculptures. A structural engineer will look at the structural analysis results for beams, slabs, cables and walls. All of these elements have forces applied to them, such as wind loads, dead loads (like self weight) and live loads (like people or vehicles). So it is important for the engineer to review how each of these elements behave under these loads. This is the core focus of structural analysis. Structural design is the methodical investigation of the stability, strength and rigidity of structures. The basic objective in structural analysis and design is to produce a structure capable of resisting all applied loads without failure during its intended life. The primary purpose of a structure is to transmit or support loads. If the structure is improperly designed or fabricated, or if the actual applied loads exceed the design specifications, the device will probably fail to perform its intended function, with possible serious consequences. A well-engineered structure greatly minimizes the possibility ofcostly failures. A structural design project may be divided into three phases, i.e. planning, design and construction.