From: "Sprague, Harold O." <SpragueHO(--nospam--at)bv.com>
Date: Tue, 22 Feb 2000 13:53:29 -0600
I did a lot of work for automobile assembly plants. Auto workers called
building columns targets. I have repaired hundreds of columns due to
It is not much of an effort to heat the flanges and bend them straight. But
with the damage you have described, I don't think that it is necessary with
a good encasement and closely spaced hoops.
Concrete will spall and will look ugly after awhile. Consider the following
Encase the column with a reinforced concrete rectangular or square section.
Provide angles with headed studs on the corners to provide armor for the
> -----Original Message-----
> From: David Handy [SMTP:dhandy(--nospam--at)trg.ca]
> Sent: Tuesday, February 22, 2000 1:08 PM
> To: seaint(--nospam--at)seaint.org
> Subject: forklift vs. crane column
> Has anyone had to repair bent columns from collisions with crane columns
> and forklift trucks. In this case the crane is a 5 ton and the load on the
> column is about 25K. The column is a W8X24 and one of the flanges is bent
> in about 1.25" where it was hit. The other side of the flange is bent
> outwards about .75". There are two impact locations and the deformation
> takes place over roughly the bottom third of the column. It does not seem
> to be bent in the weak axis. They want concrete encasement for the column
> for the future and whatever repairs are required. Since the column has
> (had) spare capacity I was considering the concrete encasement to be all
> that would be required. This column supports only the vertical load.
> Another column behind supports the lateral loads. It was also hit so I was
> going to encase them both together in a RC pier about 5' high.
> Should I weld on plates as well? Or do you think the concrete encasement
> will control any localized buckling due to the confinement?
> David Handy, P.Eng
> Ontario, Canada