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RE: Re: Steel Column Base Plates[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
- Subject: RE: Re: Steel Column Base Plates
- From: Harold Sprague <harold.sprague(--nospam--at)neenan.com>
- Date: Fri, 16 Oct 1998 18:07:31 -0600
Richard, The wedges around the perimeter are for safety during erection only and are removed once the framing is assembled and stable. I should have been more clear on this in my original post. The only shim stack left is the one in the center, which remains in place. I prefer a gap of 1 1/2", but I will increase it to 2" when the base plate exceeds 24" square. Occasionally I will add grout access holes to the base plate to assure proper consolidation. The grout used is a pumpable grout that requires forming. It is very important to make sure that the contractor abides by the manufacturer's requirements on installation. Some manufacturers require consolidation using pencil vibrators. There is a definite procedure for proper grout placement. I do not have a detail that I can e-mail. Forgive my AutoCAD incompetence. Harold Sprague, P.E. The Neenan Company harold.sprague(--nospam--at)neenan.com -----Original Message----- From: rlewis(--nospam--at)techteam.org [mailto:rlewis(--nospam--at)techteam.org] Sent: Thursday, October 15, 1998 7:28 AM To: seaint(--nospam--at)seaint.org Subject: Re: Re: Steel Column Base Plates seaint(--nospam--at)seaint.org,Internet writes: This is another issue near and dear to my heart. Number 1, I prefer a 4 bolt base plate with as wide a spread as possible using headed anchor bolts (uplift or not). The ironworker in me prefers shooting in a stack of shims in the center of the base plate. The column is placed on the shim stack and anchor bolts. For safety I suggest (engineer/iron worker hat on) that the iron workers drive shims at the perimeter of the plate mid way between anchor bolts. Harold, If you don't mind, can I ask you to elaborate on this a bit? How thick is the gap for the shims and grout? How do you ensure the base plate has complete grout under it with all these stacks of plates in there? If there is a stack in the middle, and a stack between each pair of bolts on all 4 sides, isn't it possible to have a void in the grout in an area between these stacks of plates if the iron worker isn't very meticulous in his work? Yes, I know it can happen with a double nut case as well, but with a clear opening between the bolts hopefully packing the grout will be easier. If it is not copyright protected :o), and since attachments have worked in the past, can you attach a typical detail to a file which illustrates what you do? Thanks. __________________________________________________ Richard Lewis, P.E. Missionary TECH Team rlewis(--nospam--at)techteam.org The service mission like-minded Christian organizations may turn to for technical assistance and know-how.
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