Adding new studs to existing composite steel beams
Adding new studs to existing composite steel beams
(OP)
I'm currently working on an existing composite concrete and metal deck floor structure which is supported by steel beams. My client wants to increase the loading capacity of this floor. In order to increase the loading capacity, our analysis program indicates that we will need to add additional steel studs to the beams. Can additional steel studs be add to existing steel beams, how is this done, and at what locations?





RE: Adding new studs to existing composite steel beams
Not sure what you are asking
RE: Adding new studs to existing composite steel beams
No advisale, but I think it can be done. Shore the beam, and core drill the concrete at locations add'l studs needed. Maybe you should change the studs by shapes.
RE: Adding new studs to existing composite steel beams
Meanwhile, do you have total access to the building? All partitions, carpeting, furniture, etc. will have to be out while this is being done.
RE: Adding new studs to existing composite steel beams
RE: Adding new studs to existing composite steel beams
RE: Adding new studs to existing composite steel beams
RC
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke
RE: Adding new studs to existing composite steel beams
RE: Adding new studs to existing composite steel beams
After coring the holes, the studs are fused into the steel beams/girders in the center of the core, care shall be taken during the coring operation so not to core the steel beam by mistake (the holes should be inspected for that prior to grouting the holes), in some cases forming will be needed from the underside to be able to pour the grout, it all depends whether the core hits the top or bottom flutes or in some cases both deck flutes at the same time.
Hope this helps
A
RE: Adding new studs to existing composite steel beams
A combination of adding a plate (at the bottom flange) and two angles (at the top flange)for the beams and coring studs for the girders might not be a bad idea.
RE: Adding new studs to existing composite steel beams
RE: Adding new studs to existing composite steel beams
RE: Adding new studs to existing composite steel beams
RE: Adding new studs to existing composite steel beams
say for example your beam is a W16x26 which has ~ 5.50 inch wide flange and a web = 3/8 inch thick.
The projected flange width on either side of the web would be ~ 2.6 inches.
In this case you may use a 2 - 2"x2" angles x whatever thickness you need.
The vertical leg of the angle will be 2 inches away from the web and the horizontal leg of the angle will be 2 inches below the underside of the top flange.
Use field filet welds (one sided) to the accessible welded face between the vertical angle leg and the top flange, also between the horizontal angle leg and the beam web.
Hope that clarifies the retrofit.
RE: Adding new studs to existing composite steel beams
RE: Adding new studs to existing composite steel beams
I've never done it, but at least now I understand what you mean.