on 2017-08-2208:19 AM - edited on 2021-11-2806:05 PM by Rubia Torres
This article provides a step-by-step description for creating a metal spiral stair having a column in the middle. The unique thing in this example is that the structure of the staircase is part of the tread. To see how to place a general spiral stair, click here.
Placing a spiral Stair
That type of stairs have quite a big riser and small inner circle.
The stair should not have any structure.
The Finish should contain treads only, no risers.
In this example the Built-in Tread was used with a thickness of 25 mm, 'Tread Gap' is 0.
Let's place the stair. (To see how place a spiral stair in general click here.)
Creating a custom Tread
Select the Stair in 3D and click on the 'Edit' button appearing in a blue box next to the selected stair.
Select the first step in Edit Mode.
Do a right click and select 'Convert Selection to Morph' from the contextmenu.
Exit the Edit Mode by pressing Esc or the 'Exit' edit mode button
Editing the custom Tread (Morph)
In 3D click on of it's edge on the top of the Morph and select the 'Offset All Edges' command from the Pet Palette. (You might need to change the position of the Editing Plane to 'Horizontal')
Press Alt ( on Mac) or Ctrl (on Windows) to offset the copy of the edges.
Press the Tab button and enter about 30 mm to the Tracker.
Do the same at the other side (at the bottom) of the Morph as well.
Open the 'Morph Selection Settings' and change the Building Material of the Morph to 'Steel' and disable the 'Surface Override'.