Stairs (Predefined Stair Objects)
Use the functions of the Stair Settings dialog box to create and place a predefined stair object.
To create and place a customized stair, see Custom Stairs with StairMaker.
The ArchiCAD Library includes a number of parametric GDL stair objects accessible from the Stair Settings dialog box, which function largely like other objects.
Choose the Stair Tool and open the Stair Tool settings dialog box.
Browse the loaded libraries for the predefined stair that suits your project requirement; place it as you would any other object.