cantilever a steel beam from concrete wall
cantilever a steel beam from concrete wall
(OP)
Hey all - I have a renovation project where I need to support a chunk of concrete up in the ceiling space (don't ask) with a steel beam cantilevered out from an existing 18" thick concrete wall. The load is not too substantial (<1000#/ft on the cantilever) and the cantilever distance is 3'-10"
I'm thinking that the best way to achieve a "fixed" connection for the steel beam is to embed it in the concrete wall. I could design a plate w/ anchors to take the forces and then weld the beam to the plate but I'm just not sure how secure this will be.
Does anyone have any experience w/ a situation like this? If so, what would your recommendation be?
Thanks
I'm thinking that the best way to achieve a "fixed" connection for the steel beam is to embed it in the concrete wall. I could design a plate w/ anchors to take the forces and then weld the beam to the plate but I'm just not sure how secure this will be.
Does anyone have any experience w/ a situation like this? If so, what would your recommendation be?
Thanks






RE: cantilever a steel beam from concrete wall
That is what we've always done here.
RC
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke
RE: cantilever a steel beam from concrete wall
RE: cantilever a steel beam from concrete wall
RE: cantilever a steel beam from concrete wall
RE: cantilever a steel beam from concrete wall
I don't like the embedded beam idea because you are going to run into the wall reinforcement and your connection will be dependent on how well the concrete patch work is.
OT: If it was new construction I would recommend an embed plate.
RE: cantilever a steel beam from concrete wall
1. Factored triangular stress distribution assumption be less than your factored concrete capacity. (Be very careful to ensure you are confident of the original concrete design strength & that it's still in very good condition).
2. Deep enough for whatever anchoring you're going to add to be effective. I have never seen a design procedure for a lateral load on something like this, but I would suggest a pull out load of 10% total supported load would be appropriate. Would further suggest not relying on friction between your encastre beam and the concrete as concrete shrinks.
Good luck,
YS
B.Eng (Carleton)
Working in New Zealand, thinking of my snow covered home...
RE: cantilever a steel beam from concrete wall
Regards,
YS
B.Eng (Carleton)
Working in New Zealand, thinking of my snow covered home...
RE: cantilever a steel beam from concrete wall