construct stair with different forms

[Anonymous]

how can I construct a stair in Archicad 18 with this form:

[insideru]

As far as i know, you can't. Make a custom profile for a beam, and draw a beam for each direction.

[Barry Kelly]

Either with just a few slabs (seeing as there are only 3 or 4 steps) or a custom profile as mentioned.

Or create the stair from a polygon for each side with a mitre at 45°.
You will see a line in the corner join though.

Or wait till version 21 comes out.

Barry.