Construction method of joining column and beam in building structure based on heavy-weight steel frame construction

A construction method of joining a column and a beam in a building structure based on heavy-weight steel frame construction, comprising the steps of:

• setting upright a square sleeve formed by a steel material in the shape of a box and/or square cylinder on the center of the upper surface of a base plate formed by a steel material in the shape of a plate in a posture of extending an axis in a vertical direction to connect the square sleeve to the base plate by welding;
• placing the base plate to the upper surface of a constructed footing through anchor bolts;
• inserting the lower end of a square column pipe formed by a steel material in the shape of a square pipe into the square sleeve on the upper surface side of the base plate;
• then tying the square column pipe in a temporary tightening state to the square sleeve with connecting bolts inserted into bolt holes provided in the square column pipe and bolt holes provided at predetermined positions of the wall surface of the square sleeve;
• bringing an end plate formed by a steel material into contact with the wall surface of the square sleeve by making it condition that said end plate is preliminarily welded to the longitudinal end of the beam;
• and
• joining the beam to the column by fastening the end plate to the square sleeve with said connecting bolts.