Stairs

Various stair types are parameterised and can be entered into parameter dialogs.

Workshop

Create a dog-leg concrete stair with a landing.

1. Open the stair dialog.
   
   
   
2. Select the data record "concrete".
   

   Select a dog-leg stair.
   

3. Check whether the height (storey) reference is set.
   

   The locked value is automatically the storey height, the gradient is calculated.
   Change the number of steps to alter the gradient.
   

4. Switch the limit value parameters to No optimizing.
   
   
   
5. Enter the rest of the values in the dialog.
6. Fix the length for value C + E.
   
7. Select Landing and step winding
   
   Check the alignment of the exit and entrance. If the stair lengths are fixed, the values in the dialog are locked.
   Change the thickness of the landing to 20 cm.
   
8. Select step design
   
   Enter the values for the covering
   
9. Select stringer
   
   Switch off stringer
   
   
10. Select load-bearing construction
    
    Enter thickness of the tread construction
    
11. Select stair ends
    Select entrance and exit type and set exit length to 29 cm
    
    
12. Plan graphics of stair
    
    Floor plan depiction "Top view of lower stair"
    Activate floor plan depiction for upper storey
    
    
13. Position stair in model
    first point > P1; second point > P2; placement type > P3
    
    

Click to close the screen.

Tip

Under the geometry tab, you can see the two points by which the staircase is to be placed.

Stretch

In addition to the stretch function, the construction parts, elements and hatches can also be stretched using their handles.

Workshop

The wall must be stretched in such a way that the wall corner is flush with the staircase entrance.

1. Select the wall. The wall turns magenta and handles appear on the axis. In addition to the handles, the wall can also be changed on the axes marked by a dotted line. These axes are knowns as the grippers.
2. Click in the corner on the axis (cursor symbol switches to double-arrow) P2. In the input assistant select the manipulation function STRETCH ELEMENT.
   
   
3. Set a temporary reference point RP at the corner of the stair and move the cursor vertically below the point on which you selected the axis. Orthogonal help lines are created starting from both points on the section point of which you can set down the wall.
   
   
4. Cancel the function with Esc.

Staircase opening in ground floor slab

There are a number of different ways in which the shape of a slab can be modified.

• Manipulation functions in the Input Assistant, applied to the slab contour
  Used mainly for changes to the outer contour

• Change functions in the property bar are floor offset, edit slab contour or split slab.

Workshop

The ground floor slab is to be cut out for the stairwell. The new contour of the slab must match the red line. An auxiliary line is created in this example as a drawing aid. Similarly, you can just as easily use a temporary reference point.

1. Apply an auxiliary line using the function PARALLEL STRAIGHTS with distance 0 to the staircase wall P1.
   
   
   
2. Select the slab by clicking on the outer edge of the wall below which the slab contour is also located. The selection window with the number of options will be displayed. Use the arrows to switch between the selections to select the slab.
   
   
3. Click again on the contour P2 so that the input assistant appears. Select the function REDUCE POLYGON.
   
   The input assistant switches to the drawing functions. Select the function RECTANGLE.
   
   Drag the rectangle up from the point P3 to point P4.
   
4. To check, switch to the solid design model and then back to the wire model.
   or use the key combination Ctrl+D