(1) Welding connection. It is divided into butt weld connection and fillet weld connection.
(2) Bolted connection. It is divided into tension high-strength bolt connection and friction type high-strength bolt connection.
According to the structure of nodes, there are mainly:
(1) Cross steel plate joints. It is developed on the basis of plane truss joints. The rods are composed of angle steel. The connection between the rods and the gusset plate can be made by fillet welds or high-strength bolts.
(2) Weld the hollow ball node. It consists of two hot-pressed hemispheres and then butt welded to form a hollow sphere. The rod is welded on the spherical surface, and the welding seam connecting the rod and the spherical surface can be a butt weld or a fillet weld. The rods consist of steel pipes.
(3) Bolt ball joint. It connects the rod with the solid ball through bolts, sleeves and other parts. The rods consist of steel pipes.
(4) Direct junction nodes. It is to say that after the end of the web (branch) in the network frame is machined into an intersecting surface, it is directly welded to the wall of the chord (main pipe), or the chord in one direction can be welded to the wall of the other chord. . Such nodes avoid the use of any connectors. Save the amount of steel used for joints, but require high assembly precision. The rod is composed of steel pipe or square pipe.
