Any ideas for connecting to the side of an existing concrete encased steel beam?

[BSPE90]

So I've got an existing concrete encased steel beam (red in the image). An additional 8" needs to be added to extend the floor to support a non-loading bearing partition wall. One suggestion was to attach an 8" angle (in blue) to the side of the existing concrete. How would one go about making a structurally sound connection to the existing beam? Would a row of adhesive anchors anchored into the concrete be sufficient or does it necessarily have to tie into the steel?

 

[BSPE90]

retired13, I was thinking bent plate would act like a form and the new concrete with the rebar would cantilever the 8".

 

[r13]

I understand. But are you sure the cantilever bent plate is adequate to support the partition wall? Or, are you consider to design a hanging wall?

 

[EZBuilding]

I expect you could justify attaching the ledger angle to the concrete encasement based upon the magnitude of loads you are looking at (2-4 hundred pounds per foot?). It is substantially less work.

ledger angle -> anchor -> concrete -> bearing on steel flange

 

[BSPE90]

EZBuilding, would you locate the anchor where I show it in green below (in the 4"± depth of concrete above the top flange)? I don't believe the magnitude of the load will be very high.

 

[EZBuilding]

My biggest concern with the attachment is based upon the tension resultant in the anchor due to the eccentricity of the load application. Without knowing how much concrete you have between the edge of the flange and the side of the beam I would expect that the location you have shown provides the clearest way to check the capacity of the anchor for the tension/shear resultant it expects. I would start off the exercise by trying to get tapcons or similar concrete screws to calc out.

Another alternative would be to forego the angle all together and attach the studs directly through the flange to the concrete encasement with concrete screws. I would start the exercise by considering to extend the stud down to the bottom of the beam encasement and provide and attachment near top and bottom of the encasement.