Regarding Truss to column Connection

[Arbu]

Dear All,

I am designing a truss to column connection. I need your comments about connection. Two options of connection has shown below. which one will be the structurally sound.

Connection-A

Connection-B


In connection A there is eccentricity but I can connect both bracing and bottom member on one plate and can bolt, but for connection B I need two sperate plate and bolts and there will be no eccentricity with column line. Please comment.

 

[Agent666]

Couple of questions -
Is there any difference between the column size with the two options?

Is the truss simply supported or intended to transfer moment to the column?

 

[klaus.]

Well there are many many different was to do connections.....

 

[Lomarandil]

Connection B is going to take some fancy welding to let the diagonal continue past the flange...

More seriously, connection A is more erectable. Even more so if you reverse the diagonal to be in tension (this is just more efficient anyway). (assuming gravity loads)

----
The name is a long story -- just call me Lo.

 

[dik]

I've never seen connection B used; it's not at all common.

Dik

 

[Arbu]

Dear Lo,

here diagonal is in Compression and its carrying gravity loads only. Wind loads are very less.

 

[MotorCity]

I understand what you are trying to do, but my advice would be to use connection "A". In addition to the detailer, fabricator, and erector cursing your name, you will probably have more fixity at the truss to column connection than what you intend. We usually provide horizontal slotted holes at the bottom chord to column connection so that the truss can deflect more easily under gravity loads. By attaching the diagonal directly to the column, you are effectively "locking" the bottom chord from moving.

 

[KootK]

Unless I grossly misunderstand your situation, this is what you want to do. It's contructable, conventional, robust, and keeps your point of load application reasonably concentric on the column.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[Arbu]

Dear Motorcity and Kootk,

thank you very much, I am following A type connection.