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 and Draft Wires:
 * 2) * 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.
 * 3) * Draft Lines will be used to create flights.
 * 4) * If the vertices of all lines and wires have correct Z coordinates, the created stairs will use this information.
 * 5) * The base objects must be selected in the correct order starting with the bottom object.
 * 6) Press the  button, or press,  keys.
 * 7) 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.



Data

 * : (read-only) The absolute top level the stairs lead to.
 * : 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.
 * : The left outline of the stairs.
 * : The left outline of all segments of the stairs.
 * : The right outline of the stairs.
 * : The right outline of all segments of the stairs.
 * : Height of the left railing of the stairs or landing.
 * : Height of the right railing of the stairs or landing.
 * : The left railing object. : Property type updated from to.
 * : Offset of the left railing from the edge of the stairs or landing.
 * : Offset of the right railing from the edge of the stairs or landing.
 * : The right railing object. : Property type updated from to.


 * : The alignment of the stairs on the baseline. Only used if a baseline is defined. Can be, or.
 * : The total height of the stairs. Only used if no baseline is defined, or if the baseline is horizontal. Ignored if is non-zero.
 * : The total length of the stairs if no baseline is defined. Ignored if is non-zero.
 * : The width of the stairs.
 * : If the 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, the widths of subsequent segments follow the list set here.


 * : (read-only) The calculated Blondel ratio. This ratio indicates comfortable stairs and should be between 62 and 64cm or 24.5 and 25.5in.
 * : The depth of the landing of the flight, if enabled in . Defaults to the if 0.
 * : The size of the nosing.
 * : 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.
 * : (read-only) The height of the risers. If is 0 it is calculated ( / ). Else it is the same as.
 * : The enforced height of the risers.
 * : The thickness of the risers.
 * : (read-only) The depth of the treads. If is 0 it is calculated ( / ). Else it is the same as.
 * : The enforced depth of the treads.
 * : The thickness of the treads.


 * : The type of connection between the lower floor slab and the start of the stairs. Can be, or.
 * : The type of connection between the end of the stairs and the upper floor slab. Can be or.
 * : The thickness of the lower floor slab.
 * : The direction of the flight after the landing. Can be, or.
 * : The type of landings. Can be or  ( not implemented yet).
 * : The overlap of the stringers above the bottom of the treads.
 * : The width of the stringers.
 * : The structure type of the stairs. Can be, , or.
 * : The offset between the border of the stairs and the structure.
 * : The thickness of the structure.
 * : The thickness of the upper floor slab.
 * : The type of winders. Not implemented.

Limitations

 * Only straight stairs are available at the moment
 * See the forum entry for circle stairs.
 * See the forum announcement.

Scripting
Arch API and FreeCAD Scripting Basics.

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


 * Creates a object from the given.
 * If is not given, it will use, , , and , to build a solid object.

Example: