Split surface into smaller ones

[yinodo2737]

hello
I have a ceiling surface, and I want to divide it into multiple square surfaces using the grid lines (the black lines) shown

[jacob.small]

PolySurface.ByJoinedSurfaces for the U axis surfaces and the V axis surfaces.

Geometry.Split to slice the target surface using the U polysurface.

Geometry.Split to dice the target surface using the V polysurface.