Steel moment-resisting frames consisting of welded flange-bolted web beam-to-column connections were widely used as lateral load resisting system of choice in regions of high seismic risk, because of their merits of architecture usability(such as no lateral strut required) and facilely fabrication.

Rolling forming process is analyzed for doorframe border, aimed at the characters of complex profile such as excessive blind regions, narrow bending border, and wide border, related process design program and die debugging method are provided.