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RE: Bolting issues

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Dear Colleagues,
    Thank you all very much for your input in the shear-off bolted
connection issue.  I will, after all, go with these bolts rather than the
DTIs, simply because the steel fabricator, who is supplyin the bolts,
already has plenty of experience with the former.  I have contacted the
Bristol Bolt Co. whom I'll purchase the tools from, and they will give me
support on all issues regarding erection of my building.  I will also follow
the RCSC specifications.
    My conclusion from the discussion is that I will get a well installed
building as long as I follow manufacturer´s instructions and train my crew
properly.  With high quality workmanship, the building will stand up and
deliver its required performance.  Without it, even the best system might
not work.
    Wish me luck on the bid!!!

Regards

Maria I. Falconi
Guayaquil, Ecuador

-----Mensaje original-----
De: Charlie Carter <carter(--nospam--at)aiscmail.com>
Para: Engineers (California) list server <seaint(--nospam--at)seaint.org>
Fecha: Viernes 22 de Enero de 1999 11:01 AM
Asunto: Bolting issues


>There has been a great deal of discussion on bolts lately. Some of the
>statements made were right on track. Unfortunately, a great many
>statements were, in my (humble) opinion, incorrect. For example, a few
>messages indicated concerns about over-pretensioning and subsequent
>failure in service (RCSC Specification states that pretension in excess
>of the minimum required pretension is not cause for rejection). A few
>others stated a preference for one installation method as being better
>than the others (RCSC Specification Commentary states that four
>pretensioning methods are recognized without preference and each will
>provide an acceptable result if applied properly, i.e., without
>short-cuts).
>
>I regret that I don't have the time to detail out the answers and/or
>technical justification to all the questions that have been asked in the
>bolt "thread". Ha! Pun intended! But you can all find the answers to
>these and a whole lot of other questions on your own in two documents:
>
>1. The RCSC Specification for Structural Joints Using ASTM A325 or A490
>Bolts (note: the 1994 LRFD version is the best one by far for technical
>information)
>
>2. The Guide to Design Criteria for Bolted and Riveted Joints, 2nd
>Edition, by G.L. Kulak, J.W. Fisher and J.H.A. Struik.
>
>The first reference is THE recognized standard for design and
>construction with bolted joints using A325 or A490 bolts. It's the basis
>of the bolting provisions in the AISC Specification and AISC Seismic
>Provisions. It has a Commentary that explains the basis of the
>requirements contained in it. The second reference is the source
>document that translates data from the research and investigation level
>to the RCSC Specification level. In essence, it is the Commentary to the
>Commentary to the RCSC Specification.
>
>Hope this helps (and sorry for being a bit long-winded)
>
>Charlie
>
>
>