A structure refers to a body or system of connected parts used to support a load. Important

examples related to Civil Engineering include buildings, bridges, and towers; and in other

branches of engineering, ship and aircraft frames, tanks, pressure vessels, mechanical systems,

and electrical supporting structures are important. In order to design a structure, one must serve a

specified function for public use, the engineer must account for its safety, aesthetics, and

serviceability, while taking into consideration economic and environmental constraints. Other

branches of engineering work on a wide variety of non-building structures.