Design and construction of bolted ball nodes GB

Bolt ball node refers to the node by high-strength bolts, steel balls, fastening screws, sleeves and cone heads or sealing plates, and other parts of the group, as shown in the figure below.

2. Copper ball used for manufacturing bolt ball node, sealing plate, cone head, and sleeve material can be according to the provisions of Table 1. It should be in line with the technical conditions of the corresponding standards. Product quality should be in line with the current industry standard “steel mesh frame bolt ball node” JG/T10 provisions.

3. The performance level of high-strength bolts should be selected according to thread specifications. For M12 ~ M36 high-strength bolts, the performance level of the For M12~M36 high-strength bolts, the performance level shall be selected according to 10.9S: For M39~M64 high-strength bolts, the performance level shall be selected according to 9.8S. The form and size of bolts should be in line with the current national standards “steel grid bolt ball nodes with high strength bolts” GB/T16939 requirements.

4. The diameter of the connecting screw check of the bar under pressure can be calculated by the absolute value of the bolt diameter according to its design internal force, and then reduce the bolt diameter by 1~3 grades, but it must be ensured that any cross-section of the sleeve has sufficient compressive strength.