Repair Method - structural column
Repair Method - structural column
(OP)
A 10x10x0.25 HSS Building column with 35'high ceiling got a forlift impact about 2" from the bottom floor which caused an approximately 6" dia dent (caved in) on one face while adjacent face bulged about 1" out, see attachment. Could some one advise me the best possible method to fix this? Thanks






RE: Repair Method - structural column
Check the numbers - maybe it was designed to only 30 or 50% of maximum. It might be OK as is.
Or weld plates around it to re-inforce the column.
Might want to add barriers around columns.....
RE: Repair Method - structural column
DaveAtkins
RE: Repair Method - structural column
RE: Repair Method - structural column
RE: Repair Method - structural column
RE: Repair Method - structural column
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In this particular building, we ended up replacing the column shown. Other columns that were not damaged as bad were encased in concrete and reinforcing (down to the footing). The concrete extended up few feet above beyond the damage.
RE: Repair Method - structural column
RE: Repair Method - structural column
RE: Repair Method - structural column
RE: Repair Method - structural column
1) I would detail a pedestal made from 4-L4x4 angle iron on top, 2-1/2" thick plates with holes for 4-3/4" HIT anchors on bottom and 4-HSS3x3x1/4 legs above the plates. Weld the angles of this entire assembly to the column just above the dented portion of the column. Then fasten it to the foundation using the HIT anchors. To prevent future damage I will recommand that bolards be installed.
2) I will simply encase the bottom of this column and others in the area in protective concrete with minimum reinforcing. I am sure the damage is such that the remaining section is quite capable of carrying any of the original design load!
RE: Repair Method - structural column
I'd give two justifications:
1. Its already been hit, might get hit again
2. Didn't want to do a more expensive option.
If the client is interested in selling the building in the near future, this would not be the right answer. However, that answer would be to unload the column, cut out the damage and replace in kind.
RE: Repair Method - structural column
your proposed fix sounds fine in principle.
Just do some numbers on it to make sure your decisions are based on science and not pure judgement.
RE: Repair Method - structural column
Mike McCann
MMC Engineering
RE: Repair Method - structural column
Dik