Hello
How do I give a beam a property of a concrete section, e.g. a precast concrete sy beam as specified here 
In the section database, only steel, aluminum and timber are covered and not concrete.
Is this something I have to define in section wizard? I tried drawing up the section in Autocad and importing into section wizard as a .dwg file, but it comes up as import error, does it have to be a specific version of autocad?
I look forward to your assistance
Chris