ASTM Classification Functions

Question

My company uses a custom gINT library and data template that does not use the default Atterberg data tables. I am trying to modify the ASTM_Class_Multi expression to take in data from our custom tables and output the ASTM classifications.

When we receive Atterberg laboratory data it is usually just moisture content, liquid limit and plastic limit. The ASTM classification function requires input from sieve classification that we do not usually have.

Can I modify the standard code:

<<Let(Symbol = _
<<ASTM_Symbol(_
<<SV READINGS.Reading>><<#>>,_
<<SV READINGS.Percent_Finer>>,_
<<ATTERBERG.Plastic_Limit>>,_
<<ATTERBERG.Liquid_Limit>>,_
<<ATTERBERG.Organic>>_
)>>_
)>>_

to only take in the plastic limit and liquid limit for classification for output (and take the data from the custom table GEOTECHNICAL DATA.PLASTIC LIMIT and GEOTECHNICAL DATA.LIQUID LIMIT)?

Thanks!

Joshua Burton · Accepted Answer

I was able to code my answer, but it got pretty messy when I had to lookup each value every time it was called in order to display it properly on the output table. <>,<>)>>)>> < 50) AND (<>,<>)>>)>> - 20))>> < <>,<>)>>)>> - <>,<>)>>)>>)>> > <>,<>)>>)>> - 8))>>),"SC",_ (<>,<>)>>)>> < 50) AND (<>,<>)>>)>> - 20))>> < <>,<>)>>)>> - <>,<>)>>)>>)>> < <>,<>)>>)>> - 8))>>),"SM",_ (<>,<>)>>)>> - <>,<>)>>)>>)>> > <>,<>)>>)>> - 20))>>) AND (<>,<>)>>)>> < 50),"CL",_ (<>,<>)>>)>> - <>,<>)>>)>>)>> > <>,<>)>>)>> - 20))>>) AND (<>,<>)>>)>> > 50),"CH",_ (<>,<>)>>)>> - <>,<>)>>)>>)>> < <>,<>)>>)>> - 20))>>) AND (<>,<>)>>)>> < 50),"ML",_ (<>,<>)>>)>> - <>,<>)>>)>>)>> < <>,<>)>>)>> - 20))>>) AND (<>,<>)>>)>> > 50),"MH",_ True,"Error"_ )>> )>>_ <>

SH14277 · Answer

Hi again, 
In your code (from your Friday reply) I see your "Let" functions but you are not using the "Get" function to recall them? Maybe try putting in Get(PI) instead of just PI (for example) in your Switch function. Also I don't know how the program handles the multiple less-than symbols in one statement, e.g. Get(Aline) < Get(PI) < Get(Uline). Someone with more experience might be needed. 
Seems like this might be why you couldn't get the built-in ASTM_Symbol_Plasticity function to work? It probably doesn't need to be a Let/Get actually, that's my mistake.

SH14277 · Answer

There is apparently a function called ASTM_Symbol_Plasticity, that "generates soil classifications based only on the liquid and plastic limits, and, optionally, on whether the soil is organic." I haven't used this but presumably it is assuming that your soil is fine-grained (i.e. >50% passing #200) so should be used with care?? It looks like you could do: <>,_ <>,_ <>_ )>>_ )>>_