Moment connection to web column.

[X4vier]

Hi, can I connect a bracket with wind loads that produce moment on bracket to web colum?

When I need to add stiffners like this,

And when must I use another type of connection like this flange plate?

I suposse it changes according to loads (moment) magnitude.

I know this have been asked lot of times but old post doesn't have images and if very difficult understand without the images.

Thanks.

 

[WARose]

Hi, can I connect a bracket with wind loads that produce moment on bracket to web colum?

You can....and there are several different approaches (depending on the loads and so forth). If you look in Section 5.7 of Blodgett's 'Design of Welded Structures', you will see some pics.

A lot of people use to do it with a T....these days I'm seeing it done more with individual plates and so forth. (sort of like your last pic.)

 

[X4vier]

Thanks.

 

[ProgrammingPE]

I see two potential issues with the bolted end plate moment connection.

First, you are putting out-of-plane concentrated loads on the column web. There isn't much guidance available for checking that the web will be adequate, and this will likely be pretty flexible. You are showing column web stiffeners above and below the end plate but the end plate prevents them from being too close to the beam flanges so they won't be super effective.

Second, having identical bolted connections on both sides of the column requires bolt sharing. In the US, this is not permitted per OSHA 1926.756(c)(1) since the first beam has to remain attached the entire time the second beam is being installed. This can be done by providing a seat, staggering the connections, or clipping the plate so that at least one bolt is being used exclusively for the first beam.

I would prefer transferring the beam flange loads to the column using a plate that spans between the column flanges like in your last image.

Structural Central

http://www.structuralcentral.com

http://www.youtube.com/channel/UCOj2mXXf3ZbZtgxTc6BtkGg

 

[X4vier]

Thanks a lot.