convert brep model to extrude model

Submitted by giuseppe on 29 July, 2011 - 15:53
Forums:
hello,
is possible convert a brep model to a extrudable model with a main section and a depth?
for example a column or a beam have a section(the main face) , extrude direction ,and the extrude depth .
How i find the section that it must be extruded from all surface of brep?
I think that can be a face normal problem but i don't clear understand.
thanks.
help , books , document or a simple explaination.
thanks