Arch Stairs

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 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.



Options

 * Stairs share the common properties and behaviours of all Arch Components

Usage

 * 1) Press the  button, or press,  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
Segment and Parts


 * : (Output value only : ) The 'absolute' top level of a flight of stairs leads to.
 * : Last segment (flight or landing) of Arch Stairs connecting to this segment. The stairs will start from the level of the last segment.

Base


 * : The alignment of these stairs on their baseline, if applicable.
 * : The baseline of these stairs, if any.
 * : The total height of these stairs, if not based on a baseline, or the baseline is horizontal.
 * : The total length of these stairs if no baseline is defined.
 * : The width of these stairs.
 * : When Number of Steps = 1, the Stairs object act as a Landing. And when the baseline is multi-segment, the width of each segment of the Landing follow the list set here (for 2nd edge and after - 1st edge follows Width property).

Steps


 * : (Output value only : ) The Blondel 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 Landings. Default to Width of stairs if 0.
 * : The size of the nosing.
 * : The numbers of steps (risers) in these stairs.
 * : (Output value only : ) The height of the risers - Height of stairs / Number of Steps or Riser Height Enforce.
 * : The height of the risers to enforce (override overall Height of stairs).
 * : The thickness of the risers.
 * : (Output value only : ) The depth of the treads - Length of stairs / Number of Steps or Tread Depth Enforce.
 * : The depth of the treads to enforce (override overall Length of stairs).
 * : The thickness of the treads.

Structure


 * : The direction of flight after landing. Can be Straight","HalfTurnLeft",or "HalfTurnRight".
 * : The type of landings. Can be "None" or "At center" ("At each corner" not implemented yet).
 * : The offset between the border of the stairs and the structure.
 * : The width of the stringers.
 * : The type of structure of these stairs. Can be "None","Massive","One stringer",or "Two stringers".
 * : The thickness of the structure.
 * : 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: