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RE: A325 anchor bolts

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It's the other way around.  The top of the bolts are between 1/4 to 3/8 of 
an inch from the top of the nut.  In other words, all of the threads on the 
nut are not engaged.

===== Original Message from 73527@SMTP (Roger Turk) 
{73527.1356(--nospam--at)} at 4-09-98 9:32 am
>Since there is no load applied to the bolt outside the nut, it is my opinion
>that all you would need is for the nut to fully engage the bolt threads.  (In
>fact, there is probably very little load transmitted to the bolt by the last
>nut thread regardless of the amount the bolt projects past the nut.)
>A. Roger Turk, P.E.(Structural)
>Tucson, Arizona
>Chris Palmateer wrote:
>. > I have a job in which the contractor installed the anchor bolts for
>. > moment frame to low.  The bolts are 1-1/4 in. A325 with heavy head nuts.
>. > How many threads does it take to fully develop the bolt?  If the bolts
>. > lack 1/4 to 3/8 of an inch from extending through the nut completely, how
>. > does one calculate the reduction in the capacity of the bolt?
>. >