According to
https://forums.autodesk.com/t5/advance-steel-forum/advance-steel-ifc-export/td-p/9099635
and by own tests, AS not exports to IFC weigh.
Weight is strongly needed outside AS.
As I uderstood, cause is that calculated parameters not exported.
So Idea is to allow calculated and all parameters (customers etc.) export to IFC.
Yours sincerely,
Konstantin Biktimirov