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RE: Concrete cover over conventional reinfor

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Roger,

There are some details using 8" thick reinforced footing in the book
"Standard Handbook of Structural 
Details for Building Construction" by Morton Newman (Pages 458, 459 and 462,
2nd edition).
There is a example problem 20.11.2.in the book "Reinforced Concrete Design"
by Wang and Salmon,
5th Edition, page 908-909. They designed a 9" reinforced wall footing.  Are
they wrong?? 
I have to agree that minimum thickness of reinforced footing shall be 10" by
code. 

Liao


> -----Original Message-----
> From:	Roger Turk [SMTP:73527.1356(--nospam--at)compuserve.com]
> Sent:	Thursday, September 10, 1998 7:59 AM
> To:	seaint(--nospam--at)seaint.org
> Subject:	Concrete cover over conventional reinfor
> 
> Donn,
> 
> I see no conflict between Sections 1907.7.1.1, 1915.7 and Table 18-I-C.  
> These requirements have been in the UBC and ACI Code for years.  Table
> 18-I-C 
> specifies minimum footing thicknesses, but doesn't differentiate between 
> reinforced and unreinforced footings.  The requirements of 1915.7 applies
> to 
> reinforced and pile supported footings and certainly complies with Table 
> 18-I-C.  Using the requirements of 1907.7.1.1 and 1915.7 would certainly
> make 
> 10 inches the minimum footing thickness for a reinforced footing.
> 
> A. Roger Turk, P.E.(Structural)
> Tucson, Arizona
> 
> Donn Wooldridge wrote:
> 
> . > TO THOSE WHO ARE INTERESTED:
> . > 
> . > PLEASE REVIEW UBC '97 SECTIONS 1907.7.1.1, 1915.7 AND TABLE 18-1-C FOR
> . > CONCRETE COVEREAGES OF REINFORCING STEEL.
> . > 
> . > I INTERPRET A CONFLICT (IN WHICH CASE THE MOST RESTRICTIVE WOULD
> APPLY")
> . > IN THESE SECTIONS.
> . > 
> . > A PLAN QUESTIONER (NOT TO BE CONFUSED WITH A PLAN CHECKER OR
> REVIEWER),
> . > INSISTS ON A 10" THICK FOOTING FOR SIMPLE FOOTINGS TO CONFORM TO
> . > 1907.7.1.1??
> . > 
> . > OTHER INTERPRETATIONS???
> . > 
> . > Donn Wooldridge S.E.& R.A.
> . > Phoenix, AZ
> . > 
> 
>