Crawlspace Post to beam lumber grade
Not using graded lumber can get you in trouble. Or what I mean is using a lower grade than allowed for a residence. If you ever have an earthquake this could be an area that the insurance company says they won’t cover your loss. And you want to use material that is below grade 2 and specifically listed as not for structural. 
I would not have this prior to my loss, don’t give them any reason for denying your claim.