It's better to create SVG files for 3D columns like "H" or "I" shape too?

Hi,
First of all thanks for this good tool. 
I think DSTV.NET works only for 2D Plates. But there are holes on "I" or "H" shape columns. 
It's very good to see all these surfaces on other SVG files. Than we can decide to machining all faces in CNC machines.

Regards,
Mucip:) 