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Re: Welding Base Plate to Grade 8 Bolt

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The bolts can be welded. We did it in some cases.


On Wed, Jul 22, 2009 at 1:16 AM, SGE
Structural<sgordin(--nospam--at)> wrote:
> Daryl,
> It looks like Grade 8 bolts (SAE) may be quenched and tempered, and,
> therefore, may loose strength when exposed to welding.  For "very small
> loads" it may not matter, but you still may want to check the specs.
> V. Steve Gordin, SE
> Irvine CA
> ----- Original Message -----
> From: Daryl Richardson
> To: seaint(--nospam--at)
> Sent: Tuesday, July 21, 2009 10:04
> Subject: Welding Base Plate to Grade 8 Bolt
> Fellow engineers,
>         I have a client who wants to secure a base plate to a floor using
> Grade 8 bolts.  The intent is to have the threaded end down and epoxied into
> the floor; a leveling nut will be between the floor and the base plate to
> properly position the plate for grouting; the bolt head will be cut off the
> plate will be placed over top and welded to the bolts with some combination
> of plug and fillet welds through the anchor bolt holes.  The purpose is to
> have a flush surface with no protruding bolts or nuts.  The loads on the
> A-Bolts should be very small.
>         My question is this: is the Grade 8 bolt material compatible with
> mild steel plate for welding purposes?
>         I realize this is grossly over-designed; but, hey, it's the client's
> design and his money.  It's what he wants to do.
> Regards,
> H. Daryl Richardson

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