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Re: Aluminum Base Plate

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I agree with Forrest.  I had a similar situation where the
aluminum supplier told me to put a TYP645 Bitumastic
pad between the concrete and the plate also.  Not sure
what that is though.  We used stainless steel bolts

Dan Goodrich, P.E.

----- Original Message -----
From: "Forrest Braun" <fbraun(--nospam--at)bbfm.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Friday, April 27, 2001 2:52 PM
Subject: Re: Aluminum Base Plate


> Yes, corrosion is a major concern with the connection of aluminum and
> steel.  If the bolts are regular steel bolts provide a dielectric
> material material such as a plastic sleeve and washer between the two to
> completely separate them.  For a handrail condition this may not be the
> best choice.  Other options are available to achieve the separation.
> The other options are to use stainless steel or galvanized bolts.  The
> choice here will be the environment where the railing will be used.  A
> wet corrosive atmosphere says stainless.  A dry one says galvanized.
> Review "Aluminum Structures, A guide to Their Specification and Design"
> by Kissell and Ferry for example.
>
> Todd Hill wrote:
> >
> > I need to place an aluminum base plate (handrail) on top of an elevated
> > slab.
> > I'm using steel "thru" bolts to tie the base plate to the lightweight
> > concrete surface and connecting to a steel plate below.
> > 1. Is corrosion a major concern for this type of connection?
> > 2. Is there a washer/bushing type of material to create a barrier
between
> > the steel bolt and the aluminum base plate?
> > TIA.
> >
> > Todd Hill, P.E.
> > TK Architects, Inc.
> > 816-842-7552 ext. 233
> >
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> --
> ++++++++++++++++++++++++++
> Forrest T. Braun, P.E.
> BBFM Engineers, Inc.
> Ph (907)274-2236
> Fx (907)274-2520
> Anchorage, Alaska
> http://www.bbfm.com
> ++++++++++++++++++++++++++
>
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