"Design a House with AutoCad Architecture 2021"
Published - Copyright© 2021 by Pantelis Skourtis
2.2.7 - Create the exterior stairs - Terraces
You will create the slabs of the two elevated terraces, at the front and back of the ground floor, and the stairs as shown in Fig.188.8.131.52, and Fig.184.108.40.206.
Create the slab on the floor for the terraces
You will create the slabs for the two terraces (b r t t1 u1 u s g b),and (a n o n a), and also one slab under the area (a b c1 m1 a), it is a blind area under the ground floor and beside the basement.
Draw the layout for the exterior terraces of the ground floor:
- Open, with AutoCAD Architecture, the drawing h21260_groundFloor_stair.dwg that you created in the previous step 2.2.6a or you have downloaded it.
If you wish you can download this file of the ground floor stair drawing, , by clicking here: downloads.
On the website where you will be directed, on category Custom Drawings/ Ground Floor, locate the file h21260_groundFloor_stair.dwg, click on the file name to download it, and then save it under the same name.
- On the plan view of the ground floor, draw the polylines (b r t t1 u1 u s g b),and (a n o n a) to define the terraces, as shown in Fig.220.127.116.11.
- Locate the two polylines (b r t t1 u1 u s g b), and (a n o n a), these are the outlines of the ground floor terraces at level 0.00 (Fig.18.104.22.168).
- Open the Tool palettes- Design (Fig. 22.214.171.124) that contains the tool Slab you want to use - (you may have to scroll to display the desired tool).
- Right-click on the tool Slab, and click on Apply Tool Properties to ► Linework and Walls (Fig.126.96.36.199).
- Select the polylines (b r t t1 u1 u s g b), (a n o n a), and press ENTER.
- Press n (No) to keep the polyline in the drawing.
- For the Creation Mode: select p (Projected).
- For the Specify Base Height: type the value 0.00.
- For the Specify Slab Justification: select Top.
- At the prompt ‘Select the pivot edge of the slab:’ select line (na).
- At the prompt ‘Select the pivot edge of the slab:’ select line (br) and press ENTER twice.
- On the Properties palette of the slab that will appear, on category Dimensions locate tab Thickness, change its value to 0.20 (it is, in meters, the thickness of the Ground floor terrace slab), and press Enter and Enter again.
- Before you continue, open the Layer Properties Manager, select layer A-Slab that is created automatically with object slab, click on its color and set it to 21. (The reason for changing the color of the slabs, is to distinguish visually them, while in conceptual view).
Ground floor - Exterior stair - railing
You will notice that the ground floor level is 0.000 and the level of the house deck is
-1.40, as it is shown in Fig.188.8.131.52.
You have to create a stair leading up from the terrace level of the ground floor, to the house deck, as shown in Fig.184.108.40.206, Fig.220.127.116.11, and Fig.18.104.22.168.
This stair will be a straight stair, start from level -1.40, has as width = 1.50, has a total height of 1.40, each tread = 0.30, and terminate with riser.
Draw the layout of the exterior stair:
On the plan view of the ground floor, draw the rectangular polylines (t1-t2-u2-u1-t1) and (v-v1-w1-w-v), so that it is (t1 t2) = 2.40, (t2 u2) = 1.50, and (v v1) = 2.40, (v1 w1) = 1.50. Place these polylines as shown in Fig.22.214.171.124.
To design it, you will use it from the Design Tool Palette, the type of stair called Concrete (Fig. 126.96.36.199).
If there is not this type of stairs in 'Design Tool Palette' (Fig.188.8.131.52), you will get it from Ribbon > Tools
On the Content Browser which will open, select > Design Tool Catalog > Stairs and Railing > Stairs > select the Concrete Stair icon, and click to add it within the Design Tools Palettes.
Create the exterior stair
- Open the Design Tool Palette, select the stair style Concrete (Fig. 184.108.40.206), the Properties Palette of this stair will open where you can modify the values according to your needs.
- On the Properties Palette (Fig.220.127.116.11), on category General, make sure that Style is Concrete, select Straight for Shape.
- On category Dimensions, set the value of Width to 1.50 (t2 u2) = 1.50 m), and the Height to 1.40, select Left for Justify, and select Riser for the 'Terminate with', and Tread = 0.30.
- At the prompt Flight Start Point or: select point t1 (Fig.18.104.22.168).
- At the prompt Flight End Point or: select point t2 and press ENTER. The stair was created.
- With the stair selected > on the properties-palette, on category Location > set the Elevation of the stair to -1.40.
- Select and delete polyline (t1 t2 u2 u1 t1).
In the same way, design the stair (v-v1-w1-w-v).
The stairs are created as shown in Fig.22.214.171.124 and Fig.126.96.36.199.
Stair – Cut Plane
After drawing the stair, it is possible to notice that it can’t appear in the plan view.
This is because the plan view is a horizontal section of the model at a certain level and displays anything found at this level and in a distance above and below it, as defined in Cut Plane.
Because the stair you design is on level -1.40, it is possible to notice that it can’t appear in the plan view.
To fix it, you can set individual settings for the height of the cut plane of the stair style 'concrete', that can override the global cut plane settings.
The Stair object, in AutoCAD Architecture, can have individual settings for cut planes that can override the cut plane setting of the display configuration.
To set a cut plane for the stair style concrete:
- Click Manage tab > Style Manager
- Expand Architectural Objects, and then expand Stair Styles (Fig.188.8.131.52).
- Select the wall style Concrete for which you want to set an individual cut plane and click the Display Properties tab.
- Select Plan High Detail on the Display Representations column.
- Click the Edit Display Properties button (Fig.184.108.40.206).
- On the Display Properties dialog box that will open, click the Other tab (Fig.220.127.116.11).
- Select Override Display Configuration Cut plane.
- For Cut Plane Height, enter for this drawing the value 2.40 and click OK twice.
From now on all stairs of this drawing, which have the concrete style, their Cut Plane level will be 2.40
Solution Tips for Stairs
Values entered for the design of the stair, must comply with the Design Rules, as shown on the Stair Style - Concrete dialog box (Fig.18.104.22.168).
When AutoCAD Architecture detects a problem with the way a stair is drawn, it displays a solution tip icon
on the stair in the drawing. Move the cursor over the icon to display a message that describes the problem and provide possible solutions.
You have either to change the values for the properties of the stair (e.g. Height, Riser count, Tread) or to un-check the Use Rule Based Calculator box (Fig.22.214.171.124). To uncheck the Use Rule Based Calculator box, you have to edit the stair style as follows:
• Select the stair, on Ribbon > select Edit Style > on the dialog-box Stair Styles - Concrete that will open > select the Design Rules tab > in category Calculator Rule uncheck the box Use Rule Based Calculator (Fig.126.96.36.199) and press OK.
After you apply the correct changes to the properties of the stair, or uncheck the box 'Use Rule Based Calculator', the stair Solution Tip icon will disappear from the stair plan.
Add the Railing
Railings are objects that interact with stairs and you can add railings to existing stairs. AutoCAD Architecture provides the tools that let you place railings using a railing tool with specific predefined properties. You can use the default settings of the tool or you can change the properties.
- To design the railing of this stair you will use from the Tool Palette - Design (Fig. 188.8.131.52), the style of railing called Guardrail - Pipe. If there is not this style of railing in the Tool Palette- Design, you will get it from Ribbon > Tools > and select Content Browser. you will import this from Content Browser in to your Tool Palette-design.
- To do this: On the Content Browser which will open, select > Design Tool Catalog > Stairs and Railing > Stairs
Open the Content Browser (Fig. 184.108.40.206) > Design Tool Catalog > Stairs and Railing > Railings > select the Guardrail - Pipe railing (Fig. 220.127.116.11), and i-drag it with the mouse in the Design Tools Palettes.
> select the Guardrail - Pipe Stair icon, and drag it with your mouse on the Design Tools Palettes.
To design the railing:
- Open the Design Tool Palette, select the railing style Guardrail - Pipe Fig.18.104.22.168), the Properties Palette of this railing style will open (Fig. 22.214.171.124) where you can edit the values according your needs.
- In case you use the railing style Standard you have to do the following: On the Properties Palette (Fig. 126.96.36.199), in category Location make sure that attached is set to Stair and Automatic Placement is set to Yes. In this example you use the railing style Guardrail – Pipe, so you don't need this action.
- At the command prompt Select a stair or [….]: select a point on the side (P7P8) of the stair.
- At the command prompt Select a stair or : select a point on the side (P9P10) of the stair and press ENTER.
With the same way design the railing for the interior stair (P1P2P3P4P5P6).
- The railing of the Stairs have been created as shown in (Fig. 188.8.131.52).
Crete the 3D View in Conceptual mode
- On View Cube, in the upper right corner of your screen, click on the corner WS of View Cube to get a 3D isometric view of your project.
- You can apply a Conceptual view in your plan, to have a more artistic view.
- To do this:
On Ribbon > click on View tab > on Visual panel > > select Conceptual.
- The result is shown in Figure 184.108.40.206
Save this drawing under the name h21190_groundFloor in the folder customDrawings\groundFloor you have created, its full path is: C:\ACA\my_projects\house21_190\customDrawings\groundFloor\h21190_groundFloor.
You will use this drawing in chapter 5, to create the construct drawings of your project.