About AISC design example v14.2. Need help! 4

[Danny Nguyen]

Dear bros,
I downloaded this document from the website:

https://www.aisc.org/WorkArea/showcontent.aspx?id=41920

There is a problem when I read about example of slip-critical connection.

I don't really understand what the note said. It seems that after slip-critical checking, the bearing-type checking must be performed. Is that right?
Thank all for read my question.

 

[JoshPlumSE]

You should think of slip critical as more of a serviceability limit. But, the strength limits (i.e. bearing and such) still apply.

 

[saplanti]

In case the friction grip disappears either by excessive force or other actions the connection still needs to take the ultimate forces by bearing.

 

[Danny Nguyen]

Dear bros,
Thank for your helps. However, I still do not receive the answer that I expected. I am caring about bolt connection design. And according to AISC equations of slip-critical bolt connection, I can design a connection that is stronger than connected members (This can not do if calculating as bearing type connetion). This is very useful in establishing a standard connection library and I can chose existing connection without caring about inner load in connected members.
However, according to the upper note, I still have to calculate the connection as bearing type ???
I am so dumb in this problem. Please help me!!!

 

[JAE]

I don't really understand what the note said. It seems that after slip-critical checking, the bearing-type checking must be performed. Is that right?

Both responders answered your question - Yes, you still need to check bearing on slip critical connections.

Check out Eng-Tips Forum's Policies here:
faq731-376

 

[wannabeSE]

It is also required per the specification section J3.8: "Slip-critical connections shall be designed to prevent slip and for the limit states of bearing-type connections."

 

[Danny Nguyen]

Thank all for your helps!