column/plate sizing and verifying 2

[Pimech]

Hi!
I should verify (and eventually resize) the following column.
It is made by a bottom and a top plate with two squared steel tube 200x200x10mm (welded to the plates). Please see attached sketch.
The bottom plate will be fastened to the floor through bolts.
I should choice bolts number and position.
How could I proceed? Any advice is welcome.

Thank you

 

[sticksandtriangles]

Nor have I dik... first high seismic design of baseplates and my counterparts said sounds about right. Feels crazy big to me, but my understanding of crazy big is being re-defined.

S&T

 

[strucbells]

Wow! Out of curiosity what are the plan dimensions of the base plate? And what column section?

 

[sticksandtriangles]

strucbells, i will start a new post in a bit after I finish off my stiffened design... do not want to derail this one.

S&T

 

[dauwerda]

Sourcing the steel for a 7" thick base plate may become a problem. In the utility industry for large mono poles a base plate of that thickness is not unheard of - usually with 2 to 3 anchor bolt circles around the pole. However, that is the thickness you start seeing fabricators start to use forged ring plates rather than discrete plate.