Cast-In-Place, Concrete Stairs

The Stair by Component tool in Revit will automatically create a Stair, based on a set of parameters. It also allows for Custom Shapes with its Create by Sketch option, though most stairs can be created from the simple Straight option.

stair_main

stair_modify ribbonBy default, both Run and Straight should be selected on the Create Stair, Modify ribbon.

However, before drawing anything select the Monolithic Stair (the default Cast-In-Place type) in the Properties Browser and Edit Type.

stair_parameters_default

Of all the parameters, Max Riser and Min Tread are important to have correct before modeling the stair. These parameters are “guidelines” for drawing the stair, and changing these parameters will not adjust a stair that already exists. Min Run Width is also a default, but it can be adjusted during or after stair creation. I am going to create a stair with a 12″ tread and 6″ riser:

stair_riser_tread

stair_constraintsBefore starting the stair, adjust the Base Level and Top Level in the Properties Browser. By default, Revit will try to create the stair using Levels as the Base and Top. This is a building feature, as stairs will will connect from First Floor to Second Floor.

But in the site this is not always applicable. If your landscape has several set terrace heights, it would be useful to use Levels. If  not, you can simply specify Base Level and Top Level relative to Sea Level. The trick to this is that the Top Level cannot be lower than the Base, so modify the Top before the Base.

stair_levelsThe top and base can be adjusted after creating the stair, but having them correct before drawing the stair will result in less errors. You can also check the Desired Stair Height, to make sure it is correct.

The Location Line and Actual Run Width can be modified before/ while drawing the stair, using the small green modify ribbon.

stair_sketch01

At first, the stair will be incomplete, without the top step…

stair_incomplete

…but simply select the Stair, uncheck End with Riser (in Properties), and then you can drag the stair (using the blue circle) and it will create the final step.

stair_sketch02

After finishing the Stair, Revit automatically generates a Railing for the stair. It is the default Rectangular type, which I will always change, if not promptly delete.

stair_handrail

Since there is a 1″ Nosing, the Floor also needs to be adjusted so that there is not a gap.

stair_floor01            stair_floor02

The Nosing parameters, along with several other parameters, are hidden under Run Type. These can be adjusted after the stair is created (click on the […] button on the far right).

stair_custom

This will take you into the Type Properties for another (nested) System Family. Here you can control the structure, material, nosing, and (if desired) the treads and risers [read about this in more detail in Stair Nosing, Treads, and Stringers].

stair_monolithic run_parameters

And finally, here it is again in Section.

stair_section

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4 thoughts on “Cast-In-Place, Concrete Stairs

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