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Re: Anchor rods set too low (again!)
- To: <seaint(--nospam--at)seaint.org>
- Subject: Re: Anchor rods set too low (again!)
- From: "SGE Structural" <sgordin(--nospam--at)sgeconsulting.com>
- Date: Tue, 23 Jun 2009 11:44:02 -0700
Can you weld the rod - as is, below
to the top of the nut - to the nut?
----- Original Message -----
Sent: Tuesday, June 23, 2009 10:42
Subject: Re: Anchor rods set too low
Unfortunately, there is only
about 1/8" to 1/4" of clearance between the anchor rods and the inside of the
base plate holes. I need the connection to be good for about 45k
SGE Structural wrote:
Welding of this steel does not
appear to be a problem. You may not need an extension: a 1/2" thick
weld of the 1-1/4" rod to the baseplate (inside the hole) will be good
for about 45K (LRFD). This may
be sufficient even without claiming the combined action.
V. Steve Gordin, SE
Original Message -----
Tuesday, June 23, 2009 10:15
Anchor rods set too low (again!)
I have a case where the
anchor rods have been set too low (again). They are F1554-36 1 1/4"
diameter. To make things worse, the columns have fixed bases and
have been installed with the grout below the base plate installed.
I'm not sure why the contractor even bothered to call this in this
Typically, if the rod head is flush with the top of
the nut, we use the full strength of the rod. Is there a way to determine
what the connection strength is between the nut and the rod if less than
the entire rod is engaged? I can't enlarge the holes in the
baseplate for couplers without affecting the anchor rods and I am leery of
welding on an extension of the threaded