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2021

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03

Special Headed Bolt YZP tells: Tips for installing bolts of steel structure type?


Do you know what are the tips for installing bolts for steel structures? Let’s follow the Special Headed Bolt YZP editor to have a brief look at it!
1. The bolt penetration direction of the steel structure type shall be subject to the convenience of construction, and each node shall be neat and consistent. After inserting high-strength bolts and tightening them with a wrench, remove the temporary bolts and replace them with high-strength bolts.
2. Fastening of high-strength bolts needs to be done twice. One time is the initial tightening: the initial tightening is tightened to 60% to 80% of the standard axial force of the bolt (that is, the design pretension). The second tightening is the final tightening, and the torsion shear type high-strength bolt should be screwed out of the torsion clamp.
3. After the hoisting is completed for a construction section and the steel structure forms a stable frame unit, start to install high-strength bolts.
4. Pay attention to the direction when installing torsion shear type high-strength bolts: the washer of the bolt is installed on one side of the nut, and the chamfered side of the washer hole should be in contact with the nut.
5. The bolts that have been screwed for the first time should be marked for confirmation. In order to prevent leakage, the high-strength bolts installed on the same day should be finally tightened on the same day.
6. The initial and final tightening should be symmetrically spread from the middle of the bolt group to the surroundings for tightening.
7. Due to the narrow space, high-strength bolt wrenches are not suitable for operating parts, which can be installed with heightened casing or manual wrenches.
8. The torsion shear type high-strength bolts should be completely screwed off at the tail end of the plum chuck to complete the final screwing, and no omissions are allowed.
To sum up, the editor of Special Headed Bolt YZP tells: About the introduction of the knowledge of bolt installation tips of the steel structure type, I hope you can learn more through the introduction of the above editor.