Installation Of High-strength Bolt Connection

1. The high-strength bolts are screwed by the torque method, and the screwing process test and the friction surface anti-slip coefficient test must be done before construction. After confirming that the anti-slip coefficient meets the requirements, they can be assembled. Before assembling, remove oil stains, dirt, burrs, flash, welding spatter and other attachments, and there should be no paint on the friction surface. And use a fine copper wire brush and clean cotton wire to remove the stolen goods on the bolting board surface and bolting holes. Use paint thinner or acetone to wipe off the oily areas. The bolted board surface must be dry and should not be operated in the rain. The warped board surface should be cold-worked and smoothed.

2. When assembling the components, each node should be penetrated with a sufficient number of punching nails and mounting bolts in accordance with the current standard specifications.

3. The installation of high-strength bolts should be carried out after the position of the structural members is adjusted accurately. The high-strength bolts, nuts, and washers must be used in accordance with the batch number provided by the manufacturer, and the factory state must not be changed. During installation, the direction of bolt penetration should be subject to the convenience of tightening and maintenance, but the direction should be consistent. When assembling, a washer should be placed on one side of the bolt head and one side of the nut. The inner chamfered side of the washer should face the bolt head and nut bearing surface.

4. When installing, remove the dust and rust from the bolt holes. It is strictly forbidden to forcibly penetrate the bolts. For bolt holes that cannot be penetrated freely, it should be used for reaming or reaming with a reamer or drill with the same bolt hole diameter. Gas cutting and reaming is strictly prohibited. In order to prevent steel chips from falling into the seam of the slab, all bolts around the hole should be tightened before reaming or reaming. For the components or hole positions that have been reamed or expanded, construction records should be kept for the record.

5. When assembling, the friction surface gap should be less than 1.0mm, otherwise it should be treated.

6. Before screwing, the high-strength bolts should be received according to the actual needs of each shift. The remaining high-strength bolts must be packed and stored properly, and they must not be thrown or left indiscriminately. During the installation process, do not scratch the bolts and contaminate the stolen goods.

Shandong Machinery Industrial Co., Ltd., as an enterprise focusing on the research and development, production and sales of power tools, has continuously developed and innovated in the power tool industry and improved its own strength level. At the same time, it has also served many high-quality projects and contributed to the bridge industry.