The steel structure is located on the first floor underground and the third floor above the ground, with an elevation of 20.100. The steel structure is a frame system, which is composed of steel columns, steel beams, round steel, etc. the steel columns are cross column sections, and the steel beams are H-shaped sections. Except that the butt joints of steel columns are welded, other joints are connected by high-strength bolts. High strength bolts are friction type high strength bolts.
