Protection of threads 1. The anchor bolts that match th […]
Protection of threads
1. The anchor bolts that match the steel structure should pay attention to protecting the threads during transportation, packing, unpacking, and leaving the factory. The correct method of protection is to wrap the thread with oiled paper and hemp to prevent rust and damage. It should be stored separately and not mixed with other parts to avoid mutual influence and damage to the threads.
2. When burying fixed anchor bolts in foundation construction, a cover type protective box should be used for protection after burying or fixing.
3. Before hoisting steel columns and other steel components with bases, corresponding protective measures should be taken for the threads.
Repair of threads
If the length of the damaged thread does not exceed its effective length, the damaged part can be sawed off with a hacksaw. Trim the threads with a combined steel file until the nut can enter smoothly. If the length of the damaged thread exceeds the specified effective length, the gas cutting method can be used to cut the thread longer than the original thread length. It is also used for the initial bolt of the same material, one end is processed into a thread, and the butt end is processed into a groove of 30-45 degrees, and the lower end is carried out after butt welding, and the corresponding diameter steel pipe specification and length are combined with sleeves to strengthen joint. After reinforcement, the diameter of the bolt will be larger than the hole diameter of the bottom plate, which can be solved by expanding the hole diameter of the bottom plate through gas cutting.
Therefore, corresponding protective measures should be taken during the transportation of anchor rods to avoid occupying construction time and prolonging the construction period.