Conversion truss and welding method of truss joints of conversion truss

The invention belongs to the technical field of building structures, and particularly relates to a conversion truss and a welding method of truss joints of the conversion truss. The conversion truss comprises steel columns, chord members, diagonal web members and the truss joints; the conversion truss is of a square frame structure with openings in the upper portion and the lower portion as a whole; the steel columns, the chord members and the diagonal web members are connected through the truss joints; the steel columns comprise columns shaped like a Chinese character 'ri' and box-shaped columns; the steel columns are vertically arranged; and the chord members are horizontally arranged. The truss joints are manufactured in advance, the finished truss joints can be directly conveyed to a construction site, and the construction efficiency is improved; and in the process of welding and manufacturing the truss joints, process partition plates and manholes are fully utilized, and welding is convenient. 本发明属于建筑结构技