an oversized hole in bearing connection.
an oversized hole in bearing connection.
(OP)
hey guys,
assume that in a shear connection designed as bearing type, an over sized holes were used for the holes instead of standard(24mm hole was used for m20 bolt).
the structure is already painted so no slip critical connection could be assumed, and the bolts are already bought so they cannot replace it with m22 bolts.
can you suggest a solution for this problem? .
assume that in a shear connection designed as bearing type, an over sized holes were used for the holes instead of standard(24mm hole was used for m20 bolt).
the structure is already painted so no slip critical connection could be assumed, and the bolts are already bought so they cannot replace it with m22 bolts.
can you suggest a solution for this problem? .
ôIf you don't build your dream someone will hire you to help build theirs.ö
Tony A. Gaskins Jr.






RE: an oversized hole in bearing connection.
RE: an oversized hole in bearing connection.
ôIf you don't build your dream someone will hire you to help build theirs.ö
Tony A. Gaskins Jr.
RE: an oversized hole in bearing connection.
4,000 bolts... And I thought my day was going bad.
Professional and Structural Engineer (ME, NH, MA)
American Concrete Industries
www.americanconcrete.com
RE: an oversized hole in bearing connection.
ôIf you don't build your dream someone will hire you to help build theirs.ö
Tony A. Gaskins Jr.
RE: an oversized hole in bearing connection.
The quick and easy answers are mentioned above - replace the bolts or add welded washers. Replacing the bolts likely being the easiest/cheapest. If the contractor didn't like those options I would tell him to propose his own solution.
RE: an oversized hole in bearing connection.
They might be able to prep the faying surface for the bolts to make it slip critical, but they also might need more bolts to get the connection to work due to the reduced capacity. They could also drill new standard holes in the beam at an acceptable offset, and have an extended connection be designed.
RE: an oversized hole in bearing connection.
RE: an oversized hole in bearing connection.
ôIf you don't build your dream someone will hire you to help build theirs.ö
Tony A. Gaskins Jr.
RE: an oversized hole in bearing connection.
RE: an oversized hole in bearing connection.
ôIf you don't build your dream someone will hire you to help build theirs.ö
Tony A. Gaskins Jr.
RE: an oversized hole in bearing connection.
They are likely telling you the truth about the small radius in the thick plate, but they should have made you aware of the issue and not simply increase the hole size. Sounds to me like they need to pay someone to switch out the bolts.
RE: an oversized hole in bearing connection.
RE: an oversized hole in bearing connection.
Sounds like sequentially replacing bolts (provide some number that can be removed from each connection at a time) is the way to go here.
Unless you can justify somehow that the slop is acceptable (no pin bearing issues, no load reversal, some allowance that not all bolts may bear at the same time)
RE: an oversized hole in bearing connection.
RE: an oversized hole in bearing connection.
RE: an oversized hole in bearing connection.
So replace them with bigger bolts, after checking the rest of the connection to see if it still works. (Shear rupture through the connection material is lessened with larger holes, for example.) Or weld the connection material to the beams (with the usual caveats about ensuring that connection works).
RE: an oversized hole in bearing connection.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.