Unicode symbol for orthogonal tesselation

We are considering adding another symbol to our programming language. Our philosophy is to use mnemonic symbols instead of keywords. For example, ⍉ means"transpose", while ⊣ and⊢ mean "left-side" and "right-side".

What Unicode glyphs would indicate the act of cutting a data array into orthogonal pieces?

Example:

┌────────────────────┐
│ 1  2  3  4  5  6  7│
│ 8  9 10 11 12 13 14│
│15 16 17 18 19 20 21│
│22 23 24 25 26 27 28│
│29 30 31 32 33 34 35│
└────────────────────┘

┌─────┬─────┬─────┬─────┬─────┬─────┬──┐
│ 1  2│ 2  3│ 3  4│ 4  5│ 5  6│ 6  7│ 7│
│ 8  9│ 9 10│10 11│11 12│12 13│13 14│14│
│15 16│16 17│17 18│18 19│19 20│20 21│21│
├─────┼─────┼─────┼─────┼─────┼─────┼──┤
│15 16│16 17│17 18│18 19│19 20│20 21│21│
│22 23│23 24│24 25│25 26│26 27│27 28│28│
│29 30│30 31│31 32│32 33│33 34│34 35│35│
├─────┼─────┼─────┼─────┼─────┼─────┼──┤
│29 30│30 31│31 32│32 33│33 34│34 35│35│
└─────┴─────┴─────┴─────┴─────┴─────┴──┘