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Re: 5/8" Anchor Bolts

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Does the original question have to do with the issue of thread forming primarily, or with the diameter of the shank or "body diameter" of the bolts?

If you have Breyer's Fifth Ed. handy, see page 13.4, near the bottom. He refers to the problem of "reduced diameter body bolts," in the context of timber construction.

Mark D. Anderson PE
Anchorage


----- Original Message ----- From: "Roger Davis" <rdavis(--nospam--at)sdsarch.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Thursday, February 24, 2005 4:57 AM
Subject: RE: 5/8" Anchor Bolts


Charley Carter answered a similar question on Sunday, March 24, 2002.  Try
the archives.  To summarize: It is probably okay, but it depends.  He also
said that AISC covers some of the issues in their "Frequently Asked
Questions" area on their web site.

Roger C. Davis
Architect


205 N. Dewey St.
Eau Claire, WI 54703
P (715) 832-1605
F (715) 832-7850


-----Original Message-----
From: Christopher Haffner [mailto:chaffner(--nospam--at)gorge.net]
Sent: Wednesday, February 23, 2005 5:35 PM
To: seaint(--nospam--at)seaint.org
Subject: 5/8" Anchor Bolts

I have a residential job where the installed anchor bolts (for sill plate
anchorage) are 9/16" diameter at the shank but 5/8" diameter at the threads. A standard 5/8" nut fits on the bolts. Bolts with "rolled threads" I guess
they call them (in lieu of cut threads).  AISC A307 - 5/8" diameter bolts
were specified.

Are these anchor bolts acceptable as a 5/8" diameter anchor bolt? I say no
but am interested in what you guys have to say.

Chris
Haffner Consulting Engineering
541-478-3052



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