This standard specifies the M12~M64×4 high strength bolts for joints of space grid structures (hereinafter referred to as "bolts").
This standard is applicable to the connection of joints of space grid structures.
2 Normative references
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. At the time of publication, all editions cited are valid. All the standards will be modified, however, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.
GB 2-85 Fasteners - Ends of parts with external thread
GB 90-85 Acceptance inspection, marking and packaging of fasteners
GB 196-81 General purpose screw threads - Basic dimensions for diameter from 1 to 600mm
GB 197-81 General purpose screw threads - Tolerances and fits for diameter from 1 to 355mm
GB 228-87 Metallic materials - Tensile testing
GB/T 230-91 Metallic materials－Rockwell hardness test
