how to network this?

 From:  Frenchy Pilou (PILOU)
4612.2 In reply to 4612.1 
Will works if all curves makes 4 sides surfaces!
And surfaces by surfaces if you have not a net mesh grid

So some trim and join to make ;)

PS For trim your circle draw an oblic line diameter because curiously trim don't works with your curves and circle!

EDITED: 15 Oct 2011 by PILOU