OCBF - preference on brace connection per code

[X4vier]

Hello,

I'm reviewing the brace connection preference but I'm not sure if that preference is per code.
For OCBF and SCBF.
I saw typical for brace the knife plate connection

And it's preferred over a cap plate plus knife plate.

But not sure if this preference is per code, or any requirement I'm not seeing.

Thank you.

 

[KootK]

The cleat connections of this sort are known to rack sideways under the influence of local P-delta effects. Our friends in AU and NZ are currently leading the concern regarding this stuff. I'm not sure that it's made its way into the North American codes yet.

Regardless, I do not feel that cleat connections such as this should be "preferred" in high seismic applications.

 

[phamENG]

Connection preference is not codified...it's just a preference.

I'm not aware of the issues KootK mentioned, but I'm also a low-seismic engineer. For wind and only nominal (R=3) seismic type loading, I would do the cap plate all day long. Fabricators around here have warned me that through plate type connections are wicked expensive.

 

[X4vier]

What connection are the state of art form X-bracing systems?

 

[WinelandV]

In my experience, the final design of a connection is a give and take between the designer, the fabricator, and the erector. If I can show that a specific style works, and everyone is on board, I will usually adjust my detail. Note, I work majority low-seismic areas.

Please note that is a "v" (as in Violin) not a "y".