Region Union step of stairs

Hi everyone,

Hope your fine,

I need to region union two sets of surfaces in the same list order and plane reference
to obtain one surface unioned of the two sets. Tryed in diferent ways but didnt worked…

Set A

Set B

If you have a minute to help, here is the definition with internalized data !

Thanks (46.4 KB) (41.6 KB)

Thanks alot HS Kim