Arch Stairs

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Arrow-left.svg Previous: Arch Space.svg Space
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Arch Stairs.svg Arch Stairs

Menu location
Arch → Stairs
Default shortcut
Introduced in version
See also
Arch Structure, Arch Equipment


The Arch Stairs tool allows you to build automatically several types of stairs. At the moment, only straight stairs (with or without a central landing) are supported. Stairs can be built from scratch, or from a straight line, in which case the stairs follow the line. If the line is not horizontal but has a vertical inclination, the stairs will also follow its slope.

See the Stairs entry in wikipedia for a definition of the different terms used to describe parts of stairs.

Arch Stairs example.jpg

Two constructed stairs, one with a massive structure and a landing, and another one with a single stringer.



  1. Press the Arch Stairs.svg Arch Stairs button, or press S, R keys.
  2. Adjust the desired properties. Some parts of the stairs, such as the structure, might not appear immediately, if any of the properties makes it impossible, such as a structure thickness of 0.



  • DataAlign: The alignment of these stairs on their baseline, if applicable.
  • DataBase: The baseline of these stairs, if any.
  • DataHeight: The total height of these stairs, if not based on a baseline, or the baseline is horizontal.
  • DataLength: The total length of these stairs if no baseline is defined.
  • DataWidth: The width of these stairs.


  • DataNosing: The size of the nosing.
  • DataNumber of Steps: The numbers of steps (risers) in these stairs.
  • DataRiser Height: The height of the risers.
  • DataTread Depth: The depth of the treads.
  • DataTread Thickness: The thickness of the treads.


  • DataLandings: The type of landings.
  • DataStringer Offset: The offset between the border of the stairs and the structure.
  • DataStringer Width: The width of the stringers.
  • DataStructure: The type of structure of these stairs.
  • DataStructure Thickness: The thickness of the structure.
  • DataWinders: The type of winders.



See also: Arch API and FreeCAD Scripting Basics.

The Stairs tool can be used in macros and from the Python console by using the following function:

Stairs = makeStairs(baseobj=None, length=None, width=None, height=None, steps=None, name="Stairs")
  • Creates a Stairs object from the given baseobj.
  • If baseobj is not given, it will use length, width, height, and steps, to build a solid object.


import Arch

Stairs = Arch.makeStairs(length=5000, width=1200, height=3000, steps=14)

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