I have not had a chance to look at the ACI 323.6.
Post-Tensioning Institute - in their recent updates to the manual "Standard Requirements" Section 6.3: Soils with chlorides greater than 200ppm need to be encapsulated. It seems pretty stringent.
I looked at IBC, and IBC sends you to ACI and...
Does anyone have any references for determining the corrosivity of the soil to reinforcing steel in Post-Tensioned Slabs to determine if encapsulating the tendons is necessary? I believe CalTrans has their limit at 500 ppm of chlorides. I also believe that soil moisture contents below 17.5...
What I end up doing is:
Ask or figure out the maximum and typical loads.
Run settlement analysis for the different scenarios.
Provide table with one of the columns being Max Load.
This limits the footing size.
(MaxLoad)/(All.Brng.Cap) = Max Ftng Area
Sqrt(MaxFtngArea)= B
Similar deal with...
A test commonly conducted on aggregate base course is the LA Abrasion (placing the material in a tub and rolling it around with steel balls and seeing how much it degrades). In my local area, if the test results meet certain specs, along with several other specs (PI, sieve, etc.), then it can be...
Anybody know exactly how structural engineers interpret a allowable bearing capacity from a geotech?
It really is whatever the geotech report says, in my case, the allowable bearing pressure (for shallow footings) is dead load plus design live load (or: dead load as is + (design factor)x(live...
