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---
 GuiCommand:
   Name: Arch Stairs
   MenuLocation: Arch , Stairs
   Workbenches: Arch_Workbench
   Shortcut: **S** **R**
   Version: 0.14
   SeeAlso: Arch_Structure, Arch_Equipment
---

Arch Stairs

Description

The Arch Stairs tool allows you to build several types of stairs automatically. Straight stairs (with or without a central landing) can be created from scratch. More complex stairs require base objects.

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

*Two constructed stairs, one with a massive structure and a landing, the other with a single stringer.*

Options

Usage

  1. Optionally select one or more base objects, for example Draft Lines and Draft Wires:
    • Draft Wires with two or more segments will be used to create landings. They must be on a plane parallel to the global XY plane. For example, select a U-shaped wire for a half-turn landing and an L-shaped wire for a corner landing.
    • Draft Lines will be used to create flights.
    • If the vertices of all lines and wires have correct Z coordinates, the created stairs will use this information.
    • The base objects must be selected in the correct order starting with the bottom object.
  2. Press the Arch Stairs button, or press S, R keys.
  3. 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.

*Complex stairs based on a selection of lines and wired as shown on the left.
In red the wires used for the landings at Z=1500mm, Z=3000mm and Z=4500mm.
In black the lines connecting them used for the flights. *

Properties

Data

{{TitleProperty|Segment and Parts}}

  • Abs Top|Vector: (read-only) The absolute top level the stairs lead to.

  • Last Segment|Link: Last segment (flight or landing) of an Arch Stairs connecting to this segment. The start level of the stairs will be the end level of this last segment.

  • Outline Left|VectorList: The left outline of the stairs.

  • Outline Left All|VectorList: The left outline of all segments of the stairs.

  • Outline Right|VectorList: The right outline of the stairs.

  • Outline Right All|VectorList: The right outline of all segments of the stairs.

  • Railing Height Left|Length: Height of the left railing of the stairs or landing.

  • Railing Height Right|Length: Height of the right railing of the stairs or landing.

  • Railing Left|LinkHidden: The left railing object. (v0.20) : Property type updated from {{Incode|String}} to {{Incode|LinkHidden}}.

  • Railing Offset Left|Length: Offset of the left railing from the edge of the stairs or landing.

  • Railing Offset Right|Length: Offset of the right railing from the edge of the stairs or landing.

  • Railing Right|LinkHidden: The right railing object. (v0.20) : Property type updated from {{Incode|String}} to {{Incode|LinkHidden}}.

{{TitleProperty|Stairs}}

  • Align|Enumeration: The alignment of the stairs on the baseline. Only used if a baseline is defined. Can be {{value|Left}}, {{value|Right}} or {{value|Center}}.

  • Height|Length: The total height of the stairs. Only used if no baseline is defined, or if the baseline is horizontal. Ignored if Riser Height Enforce is non-zero.

  • Length|Length: The total length of the stairs if no baseline is defined. Ignored if Tread Depth Enforce is non-zero.

  • Width|Length: The width of the stairs.

  • Width of Landing|FloatList: If the Number Of Steps is 1, the stairs object acts as a landing. When this is the case and the baseline is multi-segment, the width of first segment of the landing follows the Width, the widths of subsequent segments follow the list set here.

{{TitleProperty|Steps}}

  • Blondel Ratio|Float: (read-only) The calculated Blondel ratio. This ratio indicates comfortable stairs and should be between 62 and 64cm or 24.5 and 25.5in.

  • Landing Depth|Length: The depth of the landing of the flight, if enabled in Landings. Defaults to the Width if 0.

  • Nosing|Length: The size of the nosing.

  • Number Of Steps|Integer: The numbers of steps (risers). Must be at least 2 for a single flight, and at least 4 for a stairs with a central landing.

  • Riser Height|Length: (read-only) The height of the risers. If Riser Height Enforce is 0 it is calculated (Height / Number of Steps). Else it is the same as Riser Height Enforce.

  • Riser Height Enforce|Length: The enforced height of the risers.

  • Riser Thickness|Length: The thickness of the risers.

  • Tread Depth|Length: (read-only) The depth of the treads. If Tread Depth Enforce is 0 it is calculated (Length / Number of Steps). Else it is the same as Tread Depth Enforce.

  • Tread Depth Enforce|Length: The enforced depth of the treads.

  • Tread Thickness|Length: The thickness of the treads.

{{TitleProperty|Structure}}

  • Connection Down Start Stairs|Enumeration: The type of connection between the lower floor slab and the start of the stairs. Can be {{value|HorizontalCut}}, {{value|VerticalCut}} or {{value|HorizontalVerticalCut}}.

  • Connection End Stairs Up|Enumeration: The type of connection between the end of the stairs and the upper floor slab. Can be {{value|toFlightThickness}} or {{value|toSlabThickness}}.

  • Down Slab Thickness|Length: The thickness of the lower floor slab.

  • Flight|Enumeration: The direction of the flight after the landing. Can be {{value|Straight}}, {{value|HalfTurnLeft}} or {{value|HalfTurnRight}}.

  • Landings|Enumeration: The type of landings. Can be {{value|None}} or {{value|At center}} ({{value|At each corner}} not implemented yet).

  • Stringer Overlap|Length: The overlap of the stringers above the bottom of the treads.

  • Stringer Width|Length: The width of the stringers.

  • Structure|Enumeration: The structure type of the stairs. Can be {{value|None}}, {{value|Massive}}, {{value|One stringer}} or {{value|Two stringers}}.

  • Structure Offset|Length: The offset between the border of the stairs and the structure.

  • Structure Thickness|Length: The thickness of the structure.

  • Up Slab Thickness|Length: The thickness of the upper floor slab.

  • Winders|Enumeration: The type of winders. Not implemented.

Limitations

Scripting

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.

Example:

import Arch

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

⏵ documentation index > Arch > Arch Stairs