Safety factor calcuations
Safety factor calcuations
(OP)
Are there standard calculations for determining safety factors? I am primarily interested in screw connections to steel.
I often see safety factors from 2.5:1, 3:1 to the standard 4:1.
How can calculations be done to show allowable loads with a FS lower than 4:1 be acceptable - that is assuming the test data is such so that the SD could allow this be done.
I often see safety factors from 2.5:1, 3:1 to the standard 4:1.
How can calculations be done to show allowable loads with a FS lower than 4:1 be acceptable - that is assuming the test data is such so that the SD could allow this be done.





RE: Safety factor calcuations
For threaded fastener joints some of the many things that fall into that gap are:
An understanding of the actual loads.
The preload of the fastener actually achieved in the application vs. the specified torque that you probably looked up in a handbook.
The actual surface conditions of the joined materials.
Friction (in many places)
A high degree of confidence about your knowledge of these and many other factors in the real-world can justify use of a lower safety factor.
RE: Safety factor calcuations
Generally, the code govern your safety factors.
Michael.
Timing has a lot to do with the outcome of a rain dance.