Structural Engineering is concerned with the structural design and structural analysis of buildings, bridges, towers, flyovers (overpasses), tunnels, off shore structures like oil and gas fields in the sea, aerostructure and other structures.
This involves identifying the loads which act upon a structure and the forces and stresses which arise within that structure due to those loads, and then designing the structure to successfully support and resist those loads. The loads can be the self weight of the structures, other dead load, live loads, moving (wheel) load, wind load, earthquake load, load from temperature change etc. The structural engineer must design structures to be safe for their users and to successfully fulfill the function they are designed for (to be serviceable).
Design considerations will include strength, stiffness, and stability of the structure when subjected to loads which may be static (e.g. self-weight) or dynamic (e.g. wind, seismic, crowd or vehicle loads) or transitory (e.g. temporary construction loads or impact). Other considerations include cost, constructability, safety, aesthetics and sustainability.