Well, That appears to be a groove weld. Though maybe not by design, however the portion exhibiting penetration through the edges of one member is a fillet reinforced groove weld in a tee joint.
Some of the pictures exhibit undercut/underfill on the vertical member that I am pretty sure exceeds the limits of table 7.1.
If the weld is only specified as a fillet weld but exhibits the properties of a groove weld then it is difficult to pin that down however I think the engineering authority would be the person entity to cosult if you are unsure how to proceed.
"Suck Back: as you mention would be classified under Face or root underfill as listed in table 7.1 pg 34 which refers to groove welds only. (Not just butt joints!)
Of course I am by no means the authority on this code however the above thoughts would be on my mind should I be presented with a weld as shown in the pictures.
Have a great day.
Gerald Austin
Greeneville Tn
Let's look at it this way:
1. Why would you want that to pass?
2. That is clearly the vertical member is thin plate.. What is the stated fillet size?
3. Once you have determined the fillet size put a gage on the fillet
3a. Now observe the reduced cross sectional thickness of the vertical member of the assembly above the stated fillet leg.
3b. Reject for undercut beyond limitations for a Class A, B, or C weld.
4. Also can reject for excess fillet size I would hazard to guess.
Would you want that mess holding you above the clouds at 45,000 feet ?
Tell us more about the project.... Thin and Thick plate dimension? Process? GTAW electrode size? Material type? Heat sink? One of those things actually appears to have multiple passes if the macro reads true.