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Re: Welding Base Plate to Grade 8 Bolt

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Gentlemen,
 
        My thanks to all five of you who responded to my enquiry. My client is now convinced that there is a better way.  He will be changing the material and probably will be changing the configuration as well.
 
        Thanks again.
 
Regards,
 
H. Daryl Richardson
----- Original Message -----
To: Seaint
Sent: Tuesday, July 21, 2009 11:16 AM
Subject: Re: Welding Base Plate to Grade 8 Bolt

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 -----
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