Steel frame structure and this construction technique

PURPOSE: A steel frame structure with a structure reinforcement attached depending on the size of generated moment and manufacturing and construction methods thereof are provided to reduce the amount of steel members by increasing the bending resistance of the steel members. CONSTITUTION: A steel frame structure with a structure reinforcement attached depending on the size of generated moment comprises a pair of columns(100) and a girder(200). Each column is composed of section steel members(110) and is vertically installed on the ground. Each section steel member is composed of flanges and a web. Channels are welded to the webs of the section steel members, and reinforcements are inserted into the channels. Each reinforcement is composed of a horizontal steel plate and a vertical steel plate. The girder is composed of section steel members(210) and is horizontally welded between the columns.