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RE: UBC 1997 and ACI 318-1999

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Your local building code official will tout the "minimum" legal
requirements.  And you can hang your tort defense on the minimum legal
requirements.  That, however, does not reflect the current state of the
practice.  If you are a lawyer, you are covered.  If you are an engineer,
you need to at least consider the state of the practice.

Changes in the code are not capricious.  Codes are changed for specific
reasons.  I am very familiar with most of the ACI 318-99 changes, and I
would urge you to use the ACI 318-99.  I recommend this not just because it
is the latest requirement, but because the changes reflect the work of
research and observations of many dedicated committee seasoned engineers.  I
have debated with some of the ACI 318 committee members, they know their

That said, if the issue is serviceability, I MIGHT be more given to go to
the less stringent requirements.  It hinges on engineering judgement.

Harold O. Sprague

> -----Original Message-----
> From:	Mark Geoghegan [SMTP:mgeoghegan(--nospam--at)]
> Sent:	Tuesday, October 02, 2001 2:34 AM
> To:	Seaint
> Subject:	UBC 1997 and ACI 318-1999
> I have a question regarding UBC 1997 and ACI-318 1999 for code
> requirements
> of structural concrete.
> UBC 1997 Chapter 19 on concrete is patterned after ACI-318 1995. If you
> have
> a new concrete building structure currently on the "drawing board" do most
> engineers design to ACI-318 1999 (because it is the latest requirements)
> or
> do you still design to the UBC 1997 requirements, or does your local
> building official/agency have the say?
> My main areas of concern are minimum reinforcement, crack control, rebar
> spacing etc.
> Regards,
> Mark Geoghegan BE (Hons.-Structural)
> S T R U C T U R A L   T E C H - V S L
>             GUAM  -  HAWAII

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