In practical applications, for structures that are very important or bear dynamic loads, especially when reverse stress is caused by loads,
friction type high-strength bolts should be used. At this time, the untapped bolt potential can be used as a safety reserve. In addition,
pressure bearing high-strength bolts should be used for connections to reduce costs.
1. Ordinary bolts are divided into three types: A, B, and C. The first two types are refined bolts,
which are less commonly used. Generally speaking, ordinary bolts refer to C-grade ordinary bolts.
In some temporary connections and connections that need to be dismantled, C-grade ordinary bolts are commonly used.
Common bolts commonly used in building structures include M16, M20, and M24.
Some rough bolts in the mechanical industry may have a larger diameter and special applications.
High strength bolts
3. The material of high-strength bolts is different from ordinary bolts. High strength bolts are generally used for permanent connections.
Commonly used ones include M16~M30. The performance of high-strength bolts with oversized specifications is unstable and should be used with caution.
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