The first line is a list of Size letters with a | (pipe) delimiter separating it from its load limit multiplier.
The second through next-to-last line contain a strength value (must be incremental starting at 1) and the last line indicates the multiplier and power escalation for every 10 strength points beyond the end of the list.
This is to represent the multiplier of 4 for the first 10 beyond the end of the strength list, 16 for the next 10 (4 to the power of 2), 64 for the next 10 (4 to the power of 3) and so on.
You can change the multiplier (4) if you wish or add to the list of strength/capacity lines, but they must be incremental (no skipping strength scores).