balni gismu

x1 is a balcony/overhang/ledge/shelf of building/structure x2.

See also kajna.


In notes:

kajna
x1 is a shelf/counter/bar in/on/attached to supporting object x2, for purpose x3.
selbalni
x2=b1 is a balcony/overhang/ledge/shelf of building/structure x1=b2.