| 摘要 |
The present invention relates to a joint structure of steel pipes which includes a joint nod of a three-dimensional shape which becomes the center when multiple steel pipes are connected; and a joint member of which one side is connected with the joint nod, wherein the joint nod is lighter in internal mass than steel. The joint structure of the steel pipes according to an embodiment of the present invention is lightweight so as to reduce mass of used steel materials, thereby reducing manufacturing costs when the joint nod is manufactured. |
