Polygonal Component (Inscribed)

Tool(s): Wall + Downstand Beam, Upstand Beam + Upstand + Strip Foundation + Profile Wall

You can use Polygonal Component (Inscribed) to draw polygonal components (walls) based on the radius of an inscribed circle. Polygonal components are entered in the same way as curved components. You can define the number of straight sections that go to make up the component in the Properties dialog box.

Inscribed means that the component is based on the radius of an imaginary, inscribed circle. They are counted as partial sections. The division is at a tangent to the circle that you entered when defining the geometric outline.

Difference between inscribed and circumscribed polygonal components

Schematic overview of curved and polygonal walls

To create an inscribed polygonal component

• A tool for creating linear components is active (e.g. Wall or Strip Foundation). You have already defined the component’s parameters.

1. Enter the number of corners on the Context toolbar.
2. Click the start point of the polygonal component.
   

   • Click the point.
   • Align to points using the linear snap function and click the point.
   • Define the point by making entries in the dialog line.

   Tip: To find out how to enter points in Allplan, see Precision Drawing.

   Tip: The shortcut menu and dialog line provide tools and options to assist you in the process of entering points. For more information, see Tools and Options.

3. Click the end point of the polygonal component.

   The secant is displayed.

4. Click in the workspace to define the direction in which the arc is to extend – relative to the component line (secant).

   

   (1) Direction in which the arc is to extend – relative to the secant
   (2) Connecting point = end point of component
   (3) Center point
   (4) Connecting point = start point of component

   The position of the component axis and its direction of extension are displayed in the preview. In the case of components with multiple construction layers (e.g. walls), you can see the component setup and the thickness of the various layers. The position of the fist layer is identified by the number 1, which is displayed in the color associated with the component axis.

5. Now check the preview to see whether the component’s offset direction is correct, and if necessary, click Rotate about axis on the Context toolbar to change its offset direction.

   You can change this setting at any time while entering components.

6. By default, the system proposes the last radius used. If this value is less than ½ a, the system automatically proposes ½ a. As an aid to orientation, the program displays a perpendicular bisector which extends to the base line so that you can define the curve of the arc in terms of a center point (without having to enter numerical values).

   

   (1) Center of circle
   (2) Perpendicular bisector

7. Define the radius in one of the following ways:
   • Accept the proposed value displayed in the dialog line
   • Enter a new value in the dialog line
   • Click in the workspace.
     An imaginary perpendicular is dropped to the perpendicular bisector. The point obtained serves as the center of the circle. The value of the radius is displayed in the dialog line.

     

     (1) Proposed center of circle
     (2) New center of circle
     (3) Crosshairs

8. Press ENTER to confirm the value in the dialog line.

   The polygonal component is drawn.