Welded Splice
Welded Splice
(OP)
I need to design a welded splice at beam to beam connection only taking gravity loads (cantilvered system). One of the beams was about 2" short. I cannot full pen the flanges as I had detailed. The owner does not want to see bolts at the splice and does not want to see the splice plate exposed.(The beams are storefront beams) Is it possible to have a single splice plate welded to the webs of the beam on the non exposed sides? . Has any one designed a welded splice in such fashion.






RE: Welded Splice
b) I don't think your proposed solution will work because splices generally (to AS 4100) have to be designed for a minimum load of 0.3 x Member Capacity. Check whichever code you are using.
c) Can you change to an extended fin plate connection? This might also not work aesthetically.
RE: Welded Splice
RE: Welded Splice
Best regards,
BA
RE: Welded Splice
RE: Welded Splice
RE: Welded Splice
RE: Welded Splice
If that is the case, a plate welded to the inside of the web on each beam would carry shear and torsion. Could also fill in with a two inch plate aligned with the webs of both beams and field welded using the first plate as a backer.
A reaction of 24k is not much for a W24x55. This would be similar to a single angle connection to a column.
Best regards,
BA
RE: Welded Splice
RE: Welded Splice
No offense, you could be right on the spot. What I meant was "everybody is guessing to put the puzzle together, the resulting recommendation/comment may not necessarily to the point.
RE: Welded Splice
Hope this would help.
I will try to upload a sketch sometime later.
Thanks.
RE: Welded Splice
RE: Welded Splice
______________________________L_______
S S S
S - support/column
L - link (where splice is needed)
RE: Welded Splice
RE: Welded Splice
RE: Welded Splice
RE: Welded Splice
RE: Welded Splice
RE: Welded Splice
Kotor- Either it's a full pen weld (moment connection) or it's a pin (as is showing). How did you actually design the beam?
RE: Welded Splice
RE: Welded Splice
If it was bolted to both beams, you could do the same thing.
I would not recommend using a plate welded to both beams, since you would not have any mechanism to allow for rotation, providing the pinned support you designed the beam for.
RE: Welded Splice
The beam "worked" - claim made through confirmation by calculation, or just field observation on the finished/modified product? Load capacity of the "Design" and "as Build" wouldn't be identical, would it (the change) causes long term problem? Please elaborate further.
RE: Welded Splice
The smaller beam also is structurally adequate.
RE: Welded Splice
RE: Welded Splice
Best regards,
BA
RE: Welded Splice
RE: Welded Splice
If strength of the beams are adequate, make sure the beam end rotation/deflection at the pin is acceptable. Also, is there any transverse brace to keep the beams stable, side awing could spell trouble.
RE: Welded Splice
RE: Welded Splice
A brace to the bottom flange at or near the connection would provide torsional restraint to both beams. We can't say whether or not it is necessary as we don't know the geometry of the structure.
An eccentric connection between the two beams does not produce torsion in either beam. If a double angle is used and the bolts are 2" from the center of each beam, there is a torsional moment (24x2=48k") to be resisted by the bolts, but no torsion in either beam.
Best regards,
BA
RE: Welded Splice
Seems you have very good grab of the whole event. Wish you best luck.