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
Workbenches
Arch
Default shortcut
S R
Introduced in version
0.14
See also
Arch Structure, Arch Equipment

Description

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 Draft 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.

Options

Usage

  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.

Properties

Data

Segment and Parts

  • DataAbs Top (Vector): (read-only) The absolute top level the stairs lead to.
  • DataLast 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.
  • DataOutline Left (VectorList): The left outline of the stairs.
  • DataOutline Left All (VectorList): The left outline of all segments of the stairs.
  • DataOutline Right (VectorList): The right outline of the stairs.
  • DataOutline Right All (VectorList): The right outline of all segments of the stairs.
  • DataRailing Height Left (Length): Height of the left railing of the stairs or landing.
  • DataRailing Height Right (Length): Height of the right railing of the stairs or landing.
  • DataRailing Left (String): Name of the left railing object.
  • DataRailing Offset Left (Length): Offset of the left railing from the edge of the stairs or landing.
  • DataRailing Offset Right (Length): Offset of the right railing from the edge of the stairs or landing.
  • DataRailing Right (String): Name of the right railing object.

Stairs

  • DataAlign (Enumeration): The alignment of the stairs on the baseline. Only used if a baseline is defined. Can be Left, Right or Center.
  • DataHeight (Length): The total height of the stairs. Only used if no baseline is defined, or if the baseline is horizontal. Ignored if DataRiser Height Enforce is non-zero.
  • DataLength (Length): The total length of the stairs if no baseline is defined. Ignored if DataTread Depth Enforce is non-zero.
  • DataWidth (Length): The width of the stairs.
  • DataWidth of Landing (FloatList): If the DataNumber 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 DataWidth, the widths of subsequent segments follow the list set here.

Steps

  • DataBlondel 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.
  • DataLanding Depth (Length): The depth of the landing of the flight, if enabled in DataLandings. Defaults to the DataWidth if 0.
  • DataNosing (Length): The size of the nosing.
  • DataNumber Of Steps (Integer): The numbers of steps (risers).
  • DataRiser Height (Length): (read-only) The height of the risers. If DataRiser Height Enforce is 0 it is calculated (DataHeight / DataNumber of Steps). Else it is the same as DataRiser Height Enforce.
  • DataRiser Height Enforce (Length): The enforced height of the risers.
  • DataRiser Thickness (Length): The thickness of the risers.
  • DataTread Depth (Length): (read-only) The depth of the treads. If DataTread Depth Enforce is 0 it is calculated (DataLength / DataNumber of Steps). Else it is the same as DataTread Depth Enforce.
  • DataTread Depth Enforce (Length): The enforced depth of the treads.
  • DataTread Thickness (Length): The thickness of the treads.

Structure

  • DataConnection Down Start Stairs (Enumeration): The type of connection between the lower floor slab and the start of the stairs. Can be HorizontalCut, VerticalCut or HorizontalVerticalCut.
  • DataConnection End Stairs Up (Enumeration): The type of connection between the end of the stairs and the upper floor slab. Can be toFlightThickness or toSlabThickness.
  • DataDown Slab Thickness (Length): The thickness of the lower floor slab.
  • DataFlight (Enumeration): The direction of the flight after the landing. Can be Straight, HalfTurnLeft or HalfTurnRight.
  • DataLandings (Enumeration): The type of landings. Can be None or At center (At each corner not implemented yet).
  • DataStringer Overlap (Length): The overlap of the stringers above the bottom of the treads.
  • DataStringer Width (Length): The width of the stringers.
  • DataStructure (Enumeration): The structure type of the stairs. Can be None, Massive, One stringer or Two stringers.
  • DataStructure Offset (Length): The offset between the border of the stairs and the structure.
  • DataStructure Thickness (Length): The thickness of the structure.
  • DataUp Slab Thickness (Length): The thickness of the upper floor slab.
  • DataWinders (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)


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