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RE: Re[2]: Pretensioning Of Anchor Bolts

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You will also find that AISC does not list the A193 B7 as an anchor bolt
material, and some jurisdictions will not allow it if it not on the AISC
list.  I have had problems with the A449 specification as it is essentially
not a very good material spec.  I circumvented the problem by requiring
A193-B7 material for A449 anchor bolts.

I have used both high strength A193 B7 bolts and pretensioning on anchor
bolts on buildings.  Granted, it required some hand holding to see that it
was done correctly.

Harold Sprague, P.E.
The Neenan Company
harold.sprague(--nospam--at)neenan.com


-----Original Message-----
From: Rick.Drake(--nospam--at)fluordaniel.com [mailto:Rick.Drake(--nospam--at)fluordaniel.com]
Sent: Tuesday, October 27, 1998 9:15 AM
To: seaint(--nospam--at)seaint.org
Subject: Re[2]: Pretensioning Of Anchor Bolts


     As the person who started the thread on the pretensioning of anchor 
     bolts, I have been very interested in all the comments, especially 
     those by Harold and Charlie, who have grasped the reason for raising 
     the issue in the first place.
     
     The petrochemical industry (and others) have used pretensioning of 
     anchor bolts for many "nonbuilding" strcutures for years.  In fact in 
     the recently published "Anchor Bolt Design For Petrochemical 
     Facilities", 1997, ASCE uses 5 pages to talk about pretensioning of 
     anchor bolt procedures, including applications, methods, and 
     tightening sequences.  That is why I was curious about another 
     reputable engineering organization, AISC recommending against it in 
     the LRFD Commentary.
     
     As a member of both AISC and ASCE (as well as SEAOSC and EERI), I am 
     trying to resolve the conflicting viewpoints.
     
     Rick Drake, SE
     Fluor Daniel, Inc.
     Member ASCE, AISC, EERI, SEAOSC