Dave...that is meant for longbows, not recurves at pivot. Scattershot has the best suggestion.
A recurve that has AMO designation on it, just use a string about 4" shorter and adjust to "what works for you!"
One of the issues regarding brace height is folks don't seem to "get-it"....you must adjust brace to suit you. The manufacturer's suggestion is just that...a suggestion....a place to start.
Brace is as personal as arrow length, type, etc.
It is not set in stone for each model. May I repeat...it must be set to one's personal specifications..where it works best for that shooter. One thing great about this sport is the individual dynamics involved; you have a lot of parameters to adjust to personal taste.
If you must have a starting point, use 3" shorter for longbows and 4" shorter for recurves.
With a flemish twist type string, you can start 3" shorter for recurves as well and twist until it's right.