Thank you, my dict.cc search history contains exactly some of these words. I felt like my english got much worse but when Claude kept talking about "hunk" over and over I felt like the problem is maybe not on my end.
But even then, I think "boundary" was the more common term before some LLM decided it really liked "seam" instead.
"Load-bearing seam" doesn't make any sense.
I have instructions which is confidently ignores to never use seam and instead say interface.
It has been in common usage in computing since long before 1985 .. for a really interesting and obscure way hunk has been used: