GuiCommand: Name: Arch Stairs MenuLocation: 3D/BIM , Stairs Workbenches: BIM_Workbench Shortcut: S R Version: 0.14 SeeAlso:

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.

Options

• Stairs share the common properties and behaviors of all Arch Components

Usage

1. Optionally select one or more base objects, for example Draft Lines, Draft Wires and Sketches:
   • Draft Wires or Sketches 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 and Sketches with a single edge 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. A Sketch (plane-parallel to the XY plane) with a single edge, or a Draft Line without a delta Z will also work for a flight, the Height is then be used to construct the flight.
   • The base objects must be selected in the correct order starting with the bottom object.
2. Press the 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 (read-only).

• Outline Left All|VectorList: The left outline of all segments of the stairs (read-only).

• Outline Right|VectorList: The right outline of the stairs (read-only).

• Outline Right All|VectorList: The right outline of all segments of the stairs (read-only).

• 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

• Straight, HalfTurnLeft or HalfTurnRight stairs and landings are available at the moment
• See the forum entry for circle stairs.
• See the forum announcement.

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 > BIM > Arch Stairs

This page is retrieved from https://github.com/FreeCAD/FreeCAD-documentation/blob/main/wiki/Arch_Stairs.md