"High-strength bolts for grid structure" is a type of "bolts for steel frame structure". It is only used in the structure of bolted ball grid and reticulated shell, so it is different from the high-strength bolts that people often say. In special places, there is a slide rail on the screw rod, and there is a part of the deep groove near the top of the head, which is the area where the fastening screw (pin) in the matching "sleeve specification" (non-threaded nut) is placed. Because the pin is placed, during installation, turn the wrench to push the bolt into the bolt ball. At the same time, the pin rolls on the slide rail. When the bolt is screwed in time, the fastening screw is just in the deep groove position. The performance level of the high-strength bolts of the network frame is related to the bolt hole diameter, the small radius is 10.9, the large radius is 9.8, and its material is also related to the hole diameter. The thread standard of the high-strength bolts of the network frame is from M12 to M64. In fact, it can be seen from this: "High-strength bolts for steel network frame bolt ball joints GB/T16939-1997", among them, those within M20 are commonly used in the decorative design of the network system. Since there is a fixed internal connection in the node structure, the length of the screw rods of each type of high-strength bolts of the network frame is also the same, and the relevant information can be mainly referred to. Since the specifications of the high-strength bolts and sleeves of the network frame are produced by supporting facilities, the stressed members are determined according to the pressure of the sleeve specifications during node design to determine the bolt type.