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Re: Special Inspection

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Special Inspection has been required in the UBC since ???, (before 1964) and 
is different from quality control testing and regardless of the Seismic 
Zone.  Special Inspection is *NOT* in lieu of or a substitute for 
jurisdiction inspections, nor is it intended to replace the contractor's 
quality control procedures and tests.

>From the 1985 UBC (the most recent that I have at home), Section 306 states, 
[full descriptions not included]  (Changes have been made to the list since 
this edition):

"Special Inspections

Sec. 306. (a) General.  In addition to the inspections required [to be 
performed by the jurisdictions], the owner shall employ a special inspector 
during construction of the following types of work:

1. Concrete: During the taking of test specimens and placing of all 
reinforced concrete and pneumatically placed concrete.  [Exceptions omitted.}

2. Ductile Moment-Resisting Concrete Frame.

3. Reinforcing Steel and Prestressing Steel.

4. Welding.

5. High-Strength Bolting.

6. Structural Masonry.

7. Reinforced Gypsum Concrete.

8. Insulating Concrete Fill.

9. Spray-Applied Fire Proofing.

10. Piling, Drilled Piers and Caissons.

11. Special Grading, Excavation and Filling.

12. Special Cases:  Work which, in the opinion of the building official 
involves unusual hazards."


A. Roger Turk, P.E.(Structural)
Tucson, Arizona

Gail Kelley wrote:

. > Well,  doesn't the UBC only require special inspection for Seismic 
. > Performance categories greater than B?

. > If so,  when someone is out testing concrete on a "B" job,  what is it 
. > called?

. > Concrete testing is standard on almost all jobs, other than someone 
. > pouring a new patio.  But in this area, at least,  the concrete inspector 
. > often does not speak English.  If they speak English, they are likely a 
. > high-school drop out.   They are probably ACI certified,  but I would 
. > hate to think I was relying on them to be eyes and ears. Whether they are 
. > contractually obligated to the owner or the engineer,  it seems they are 
. > really just testers - they do the test, they write down the numbers.

. > Post-tensioning is kind of interesting; usually if you have a blow-out,  
. > it is because the tendons were placed with too much of a curvature - this 
. > is something an experienced person could probably see if reviewing the 
. > tendon layout before the concrete was poured. Blowouts are never (at 
. > least in my experience) blamed on the inspector, however, the inspector's 
. > contract may say something about verifying the tendon layout,  but the 
. > only thing they check is number of tendons and profile.

. > Also,  where else (how else) is concrete testing required by the codes, 
. > other than under the list of Special Inspection requirements?

. > Gail Kelley

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