Nodes: In a space frame, nodes are forging steel balls drilled any number of holes according to the project needs to connect pipe members with bolts.
Pipes: Pipes are circular hollow section with cone-shaped steel forgings welded at the ends.
Bolts: Bolts can turn inside the conic elements to connect pipe member to the node and resist against the pulling forces occurring in the system.
Sleeves: The sleeves are special nuts without thread, a long hole on the lateral side to connect the bolts to the nodes.
Pins: The pins are the materials fixing the bolts to the sleeves, so when sleeves turn, the bolts also turn. There is no any carrying function of the pins.