Stair Component Instance Properties

Name	Description
Constraints
Base Level	Specifies the level for the base of the stairs. When creating a stair in a Plan view, the associated level is set as the base 3D view, the bottom level of the project is set as the base Elevation or section view, you are prompted to select the level
Base Offset	Sets the offset of the stairs from the base level.
Top Level	Sets the level for the top of the stairs. The default is the level above the base level or Unconnected if there is no level above the base level.
Top Offset	Sets the offset of the stairs from the top level. (Not applicable if the value of Top Level is Unconnected.)
Desired Stair Height	Specifies the height of the stair between the base and top levels. (Only available for modification if the value of Top Level is Unconnected.)
Multistory Top Level	Sets the top of the stairs in a multistory building. The advantage to using this parameter (as opposed to sketching individual runs) is that if you change the railing on one run, that railing is changed on all the runs. Also, if you use this parameter, the project file size does not change as significantly as it would if you sketched individual runs. Note: The levels in a multistory building should be a uniform distance apart. For example, each level should be 4 meters apart.
Dimensions
Desired Number of Risers	The number of risers is calculated based on the height between levels.
Actual Number of Risers	Normally the same as Desired Number of Risers, but may vary if you do not complete adding the correct number of risers for the given run of the stairs. (Read only)
Actual Riser Height	Displays the actual riser height. The value is equal to or less than the value specified in the Maximum Riser Height stair type property. (Read only)
Actual Tread Depth	You can set this value to change the tread depth without having to create a new stair type. Also, the Stair Calculator can change this value to satisfy the stair equation.
Tread/Riser Start Number	Specifies the starting number for the tread/riser numbering annotation.
Structural
Structural	Indicates that the element has an analytical model.
Rebar Cover - Top Face	The rebar cover distance from the stair top face.
Rebar Cover - Bottom Face	The rebar cover distance from the stair bottom face.
Rebar Cover - Other Faces	The rebar cover distance from the stair to adjacent element faces.
Identity Data
Comments	Specific comments on the element.
Mark	A label created for the element. A message 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.)
Phasing
Phase Created	The phase when the element was created.
Phase Demolished	The phase when the element was demolished.