What Are The Basic Requirements For Bolted Connections in Grid Structures?

Bolt tightening: Tighten the bolt to the corresponding position, ensuring the stability of the bolt and ensuring that there are no visible sleeve contact joints.
Component installation: The bending degree of the component shall not exceed the corresponding safety standards. The installation site shall be clean, without scratches, omissions, or obvious gaps, and there shall be no dents or incorrect installations.
Use of washers: Flat washers should be placed under the bolt head and nut to increase the pressure bearing area. The number of flat washers placed on the bolt head side should generally not exceed 2, and the number of flat washers placed on the nut side should generally not exceed 1.
Anti loosening device: For bolts with design requirements for anti loosening, nuts or spring washers of the anti loosening device should be used, and the spring washer must be set on one side of the nut.
Specific specifications and quality control measures for bolted connections
Quality control: After the installation of the grid structure, the longitudinal and transverse lengths of the grid should be less than L/2000 and not less than or equal to 30mm, and the foundation offset of the support should be less than L/3000 and not more than 30mm.
Measurement tools: Quality inspectors should prepare measuring instruments such as theodolites, level gauges, and steel rulers to keep track of the construction situation and make necessary records.
Anti loosening device: For bolted connections that bear dynamic loads or important parts, spring washers should be placed according to design requirements, and the spring washers must be set on one side of the nut.
Special material usage: When using inclined connections for I-beams and channel steels, inclined washers should be used to ensure that the bearing surfaces of the nut and bolt heads are perpendicular to the screw.