How to create circular staircase !

That is still NOT possible in AECOsim when using the Stair Tool. You only have 2 options;

1. Create the stairs using MicroStation tools (solids, surfaces, etc)

2. Use the Stair Maker tool (Tools > Tool Boxes > TF Utilities)

Personally I don't like the result of Stair Maker, your choice.

HTH

That is still NOT possible in AECOsim when using the Stair Tool. You only have 2 options;

1. Create the stairs using MicroStation tools (solids, surfaces, etc)

2. Use the Stair Maker tool (Tools > Tool Boxes > TF Utilities)

Personally I don't like the result of Stair Maker, your choice.

HTH

And maybe GC as well.