The steel framing of a multi-storey building is a system of beams, girders or trusses, and columns, designed to carry all the gravity loads of the structure and to resist wind and earth-quake forces.

多层建筑物的钢框架是梁、次梁或桁梁，以及柱子的体系，用以承受结构的全部重力荷载和抵抗风荷及地震力。