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Cover (Geometry)

Last modified by Iwona Budny Bjergø on 2022/01/18 12:22

Cover propertyDescription
Modules where available1585060836641-319.png 1585060852908-429.png
GeometryAny shape
Load directionArbitrary in 1585060844382-468.png
Load typeSurface load
Available analysis results-
Default Short Command

COV (Cover)

BCOV (Building cover)

Table: Cover properties

Definition steps

  1. If needed, set a proper position for the working plane.
  2. Start 1585060052215-644.png Cover command from 1585060063357-318.png tabmenu and choose 1585060072153-643.png  Define.
    Figure: Cover toolwindow
  3. Set the cover type if it is slab/roof type 1585060101700-230.png or wall type 1585060111584-533.png
    Figure: Cover types
  4. Choose a geometry definition method for the cover’s plane.
    Note: In case of arc geometry in wall covers, you must set the maximum angle between neighboring covers at 1585060362726-569.png , since arced walls are replaced with straight sections.
  5. Set the load bearing directions with 1585060382335-944.png.
    Figure: Setting the load direction (monodirection)
  6. Defining the supporting structures with 1585060467129-210.png.
    After defining the supporting structures, the equidistant lines will appear with the load distribution zones.
    Figure: Defining cover’s supporting structures
light.pngActivating the Auto supports checkbox will automatically determine the supporting structures for the cover. These can be modified later.

When using Auto supports, the following objects or elements will be recognized as supports if they are located in the cover’s plane:

  • Beams and columns (including fictitious ones)
  • Line supports and line support groups
  • All inner and outer edges of slabs and walls (also working with fictitious ones)
  • all point elements (such as point supports)

The Supporting structures and the Load bearing direction commands can be used to alter the automatically determined specifications.

To automatically assign supporting structures to previously defined covers simply use Select supporting structures automatically option.


Building cover

With this command frequently required shapes such as flat roof, ridge roof, or inclined roof can be very quickly defined.

Figure: Starting Building cover command

Flat roof: 1585060642081-539.png and its height parameters: 1585060646507-939.png  

No negative value is accepted for either h or h’.

Lean-to:  1585060653815-802.png and its height parameters: 1585060659213-907.png    

No negative value is accepted for either h or h’.

Ridge-roof: 1585060670036-420.png  and its height parameters: 1585060677970-566.png

Negative values is accepted for h’.

warning.pngKeep in mind that in EC, the total height is signed by h which is h+h’ in the program’s notation. This is important in wind calculation according to EC which requires the reference height.

After setting the height parameters you can create the layout rectangle. In the picture below you can see the three types with their assumed stiff direction.


warning.pngAll building covers are monodirectional by default except the upper surface of flat-roof. (They can be changed one by one after definition.)

By clicking on 1585060771815-214.png  (Properties) you can change the ID and the height parameters of the building cover:

You can explode the building cover with 1585060792066-627.png, and then edit the covers one-by one.

The Auto supports function is available for building covers as well.

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