steel column splice with girder on top cap plate
steel column splice with girder on top cap plate
(OP)
I'm trying to design a column splice over an existing 8" diameter steel tube column. The problem is that the top of the column supports the end of a joist sit on a cap plate above the existing column. Normally Id splice new column with old by end plates, but since the girder is connected by cap plate, I'm not really sure what to do?






RE: steel column splice with girder on top cap plate
1)Column discontinuous
2) Column continuous
1) Check out to see what needs to be done to transfer the column load thru the girder. For instance, stiffeners or other elements. Make sure you maintain stability of all components.
2) Another approach is to allow column to be continuous by creating brackets to support the girders and joists. This will create eccentricities that will cause bending moments in the column for various unbalanced load conditions. Column should be checked and reinforced or upsized to accomodate this.
Good Luck!
RE: steel column splice with girder on top cap plate
The connection has to be discontinuous, since the connection between the girder and the lower column already exists, and it would be very difficult to change it. The problem is that the girder is a built up truss girder and I really dont see how to add stiffeners in order maintain load continuity and stability from new upper column to lower one. If someone knows of some guide or have seen this done, Id appreciate advice.
Here I posted a very elemental drawing of the actual connection where I want to do the column splice.
RE: steel column splice with girder on top cap plate
What size is the new column relative to the existing column?
A few more drawings/photos would help a lot.
RE: steel column splice with girder on top cap plate
RE: steel column splice with girder on top cap plate
RE: steel column splice with girder on top cap plate
BA