The construction of the technology node plays a critical role in the overall structure of space grids. As one of the most essential components, it directly influences the mechanical performance of the entire grid system, as well as the efficiency of production, installation, cost control, and project timelines. Because of its significant impact, the study and optimization of nodes have always been a central focus in the field of grid structure design.
A welded hollow bolt joint is a versatile solution that combines the advantages of both bolted ball joints and hollow spherical joints. It consists of a hemispherical shell, a cylindrical shell, and a cover plate. Bolt holes are drilled into the housing, allowing high-strength bolts to connect all the members of the grid. This type of joint offers benefits such as lightweight design, reduced machining requirements, and ease of on-site assembly, especially for double-layer flat grids where slope adjustments and construction convenience are important.
This joint system provides considerable spatial flexibility and economic value. Its main components include a thick-walled spherical shell, a cover plate, high-strength bolts, inner and outer washers, and a conical head. The size of the spherical shell is determined based on the dimensions of the connected elements. Typically, the spherical part is a slightly larger hemisphere than the flat end of the cylindrical shell, with the cylindrical end cut to facilitate easier installation.
Most parts, including the shell, cover plate, and washers, are manufactured in the factory, enabling efficient mass production and ensuring consistent quality. The conical head and steel pipe are welded together at the factory and transported to the site, which simplifies on-site installation. However, the interaction between the housing and the cover plate remains a complex issue, as different connection methods significantly affect the load-bearing capacity of the joint.
To simplify manufacturing, the housing and cover plate are often welded together, taking full advantage of the restraining effect of the cover plate on the housing. This connection also ensures good sealing properties, offering protection against corrosion and rust, particularly on the internal surfaces of the housing.
For space grids used as roof structures, the upper node is designed to face upward, making it easier to lay roofing materials and adjust slopes. This design not only enhances structural performance but also improves construction efficiency and long-term durability.
Steel Structure Warehouse,Modular Steel Warehouse,Prefab Steel Structure Warehouse,Light Steel Frame Warehouse
Foshan Shengbang Steel Structure Co.,Ltd , https://www.sbsstructure.com