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2.2.6- Create the interior stair up to the ground floor

In this step, you will create the interior stair leading up to the first floor.
This is a multi - landing stair with 1/2 turn, starting from the ground floor and leading up to the first floor. The total height between the ground floor and first floor is 3.20 (m) and the number of steps is 17. The position of the stair on the ground floor plan, its shape, and dimensions are as shown in Fig.2.2.6.7, and Fig.2.2.6.8.
Open with AutoCAD Architecture the drawing, you created in the previous lesson, under the name h21260_groundFloor_slab, or if you wish you can download it by clicking here ►downloads. Locate, and open it.

Create the stair

This stair is a multi - landing stair with a 1/2 turn stair. To design it, you will use it from the Design Tool Palette (Fig. 2.2.6.1), the style of stair called is Concrete. If there is not this type of stairs in 'Design Tool Palette', you will get it from the Content Browser.

• To do this, open the Content Browser:
  On Ribbon > Home tab > click on Tools > and select Content Browser (Fig. 2.2.6.2).
• On the Content Browser which will open, select > Design Tool Catalog > Stairs and Railing > Stairs (Fig. 2.2.6.3) > select the Concrete Stair and drag it with your mouse on the Design Tools Palettes.
• On the ground floor plan, draw the polyline (A (1) (2) (3) (4) B k C A), according to the dimensions shown in Fig. 2.2.6.5, it is the footprint of the stair as it is to be fitted.

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• You will design of the stair using the stair style "Concrete" that you'll get from the Design Tool Palettes or the Content Browser.
  The stair will be designed with the qualities of the type of stair you choose on the design tool palette, and in accordance with the treatment, you will do on its properties. You can edit anytime the properties of the stair in the Properties Palette (Fig.2.2.6.4).
• Select polyline, right-click on it, and at its properties, set its elevation value to 0.00.
  You will create the design of the stair using the stair style "Concrete" that you'll get from the Design Tool Palettes or the Content Browser.
  The stair will be designed with the qualities of the type of stair you choose on the design tool palette, and in accordance with the treatment, you will do on its properties.
  You can edit anytime the properties of the stair in the Properties Palette (Fig.2.2.6.4).

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Design the stair.

• Open the Design Tool Palette, right-click on the stair style Concrete (Fig.2.2.6.1), the Properties Palette of this stair will open (Fig. 2.2.6.4), where you can modify the values according to your needs. Alternatively, you can select the Stair tool on Ribbon:
• On the Properties Palette (Fig. 2.2.6.4), select Multi-landing for Shape, ½ turn for Turn type, Right for Justify, and select Riser for the 'Terminate with'.
• Define the value for Width to 0.900 (A (1)) = 0.900 m), for Height to 3.200, and for Riser Count to 18.
• On category Location, set Elevation = 0.00.
• On category Advanced > Interference > define the Headroom height to 3.000.
• At the prompt First Star Point: select point (1) (Fig.2.2.6.5).
• At the prompt Flight End Point: select point (2).
• At the prompt Flight End Point: select a point perpendicular to the line (3)-(4).
• At the prompt Flight End Point: select point downward of the line (5)-(8), and press ENTER.

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The stair has been created as shown in Fig. 2.2.6.6.
If the stair doesn’t fit with its footprint, move it to the exact position using the grips.
Clicking on the stair you will notice the grips (Fig.2.2.6.6).

• Select and move with your mouse the grip “Turn Point” to point (7), and move the grip “Flight End” perpendicular to line ((7) (8)).
  The stair will be placed in its final position, as shown in Fig.2.2.6.7.
  
  
  

To set User-Specified Settings in a Multi-Landing Stair

• Select the stair and on its Properties Palette > category Dimensions > Select  the icon  next to Calculation rules , to open the Calculation Rules dialog box, and set all fields to automatic by turning the icons to  (Fig.2.2.6.8).
  
  
• Specify the total number of stair risers: Click on the B - Riser count the icon   to change it to   (user-defined) and type the value 18 for the Riser Count (Fig.2.2.6.9).
  When Riser Count is set to   (user-defined), you can specify a value that is used to calculate the tread depth and riser height.
  If these values fall outside the stair limits, an error message   is displayed.
• Specify the tread depth of each tread in the stair flight: Click on the D -Tread icon, to change it to user-defined ,  and enter the value 0.25 for the Tread. Click OK.

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Create a 3d Conceptual view

• Click on the corner WS of the View Cube icon  to get a 3D isometric view of your project or select the 'Top' from the View Cube to get a floor plan of your project.
  You can apply a Conceptual view of your plan to have a more artistic view (Fig.2.2.6.10).
• To do this, on Ribbon > click on View tab > select Visual panel > select Conceptual
  • To have a better three-dimensional picture of the stair, you can hide some of the walls and openings that hide the stair.
  • To do this: Select the walls and openings you want to hide, click Isolate Objects (the icon in the bottom right corner of your screen), and choose to Hide Objects.
  The walls and openings you have chosen will be hidden, as shown in Fig.2.2.6.10.
  • To make the wall to reappear, right-click on the screen that displays your design, in the window that opens select: Isolate Objects > End Object Isolation.

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