Who has seen this kind of bolt
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Who has seen this type of bolt? What are the standards? large pitch
I’ve never seen one with such a large spacing; I’ve only seen twist drills.
This post was last edited by zjq1962 on 2020-11-25 09:51. This shouldn’t be a bolt; it doesn’t serve a tightening purpose, but only transmits force
Seen it once. It seems to be a German bolt
Yes, in Spain it’s used in design for fire-resistant material inserts, not on pressure vessels
This post was last edited by qugd on 2020-11-30 at 10:42. These are embedment bolts, or corner bolts. It is a non-standard product and is rare in China. Its fixing function is similar to that of bolts and rebar in civil engineering. Since it is a embedded component, threads are provided on the bolt body to prevent it from loosening. Unlike those commonly used in China, where there is a part at the end of the bolt that bends sideways to serve a reinforcing purpose, such bolts cannot be removed if the installation location or dimensions are not appropriate, without damaging the floor or the cast flooring. And such bolts can be unscrewed using a wrench with high torque, without causing significant damage to the floor.
Upstairs, are there corresponding standard codes? For reference.