Stair Component Type Properties

Stair Types

When you create a stair, you select a stair type from 3 predefined system families: Cast-In-Place Stair, Precast Stair, and Assembled Stair. The following table illustrates some of the different types of stairs you can create.

Stair Type	Example
Cast-In-Place Stair: Monolithic Run and Monolithic Landing (examples with treads and without treads)
Precast Stair: Notch Connection
Assembled Stair: Wood Stair (non-monolithic run and non-monolithic landing)
Assembled Stair: Steel Stair (non-monolithic run and non-monolithic landing)
Assembled Stair: Steel Run and Monolithic Landing (non-monolithic run and monolithic landing)

Type Properties

Name	Description
Calculation Rules
Minimum Run Width	Sets the initial value for the width of a common run. This parameter does not affect the creation of a sketched run.
Calculation Rules	Click the button to open the Stair Calculator dialog. See Using the Stair Calculator.
Construction
Run Type	Defines the type for all runs in the stair element.
Landing Type	Defines the type for all landings in the stair element.
Function	Indicates whether the stairs are interior (default value) or exterior. Function is used in scheduling and to create filters to simplify a model when exporting.
End Connection (Precast Stair Only)
Connection Method	Defines the join style between a run and landing. Straight Cut: Notch: Note: The run must start/end with a tread to use the notch connection method. In this example, the bottom run ends in a tread where it connects to the landing so the notch connection is valid.
Notch Extension	Specifies the horizontal length of the notch profile.
Notch Thickness	Specifies the vertical length of the notch profile from the top.
Horizontal Gap Distance	Specifies the height of the horizontal gap between the run and landing.
Vertical Gap Distance	Specifies the width of the vertical gap between the run and landing.
Supports
Right Support	Specifies whether a Stringer (Closed), Carriage (Open), or No right support is created with the stair. A stringer encases the treads and risers. A carriage exposes the treads and risers.
Right Support Type	Defines the type of right support used in the stair.
Right Lateral Offset	Specifies a value to offset the right support from the edge of the run in a horizontal direction.
Left Support	Specifies whether a Stringer (Closed), Carriage (Open), or No left support is created with the stair. A stringer encases the treads and risers. A carriage exposes the treads and risers.
Left Support Type	Defines the type of left support used in the stair.
Left Lateral Offset	Specifies a value to offset the left support from the edge of the run in a horizontal direction.
Middle Support	Indicates whether intermediate supports are used in the stair.
Middle Support Type	Defines the type of intermediate support used in the stair.
Middle Support Number	Defines the number of intermediate supports used in the stair.
Graphics
Cut Mark Type	Specifies the cut mark type displayed in the stair. See Modifying the Cut Mark.
Treads
Minimum Tread Depth	Sets the minimum tread width along the center path for all common runs (winder, spiral, and straight). This parameter does not affect the creation of a sketched run.
Risers
Maximum Riser Height	Specifies the maximum height of each riser on the stair element.
Identity Data
Keynote	Adds or edits the element keynote. Click the value and then click the browse button to open the Keynotes dialog. See Keynotes.
Model	The model type for the element, if applicable.
Manufacturer	Manufacturer for the element materials, if applicable.
Type Comments	Specific comments on the element type.
URL	A link to a web page for the manufacturer or other appropriate link.
Description	A description for the element type.
Assembly Description	Description of the assembly based on the assembly code selection.
Assembly Code	Uniformat assembly code selected from hierarchical list.
Type Mark	A value to designate the particular type. This value must be unique for each type in a project. Revit warns you if the number is already used but allows you to continue using it. (You can see the warning using the Review Warnings tool. See Reviewing Warning Messages.)
Cost	Material cost.