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Fredrik Lagerström 13.1 1 {{box cssClass="floatinginfobox" title="**Contents**"}}
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Fredrik Lagerström 46.1 6 (% border="1" class="table-hover" style="width:415px" %)
7 |(% style="background-color:#0076cb; width:226px" %)(% style="color:#ffffff" %)Cover property|(% style="background-color:#0076cb; width:186px" %)(% style="color:#ffffff" %)**Description**
8 |(% style="width:226px" %)Icon|(% style="width:186px" %)[[image:1585060826280-856.png]]
9 |(% style="width:226px" %)Modules where available|(% style="width:186px" %)[[image:1585060836641-319.png]] [[image:1585060852908-429.png]]
10 |(% style="width:226px" %)Geometry|(% style="width:186px" %)Any shape
11 |(% style="width:226px" %)Load direction|(% style="width:186px" %)Arbitrary in [[image:1585060844382-468.png]]
12 |(% style="width:226px" %)Load type|(% style="width:186px" %)Surface load
13 |(% style="width:226px" %)Available analysis results|(% style="width:186px" %)-
14 |(% style="width:226px" %)Default Short Command|(% style="width:186px" %)(((
15 COV (Cover)
Fredrik Lagerström 13.1 16
Fredrik Lagerström 46.1 17 BCOV ([[Building cover>>||anchor="Building cover"]])
18 )))
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Fredrik Lagerström 13.1 20 Table: Cover properties
21
22 **Definition steps**
23
24 1. If needed, set a proper position for the **working plane**.
Fredrik Lagerström 40.1 25 1. Start [[image:1585060052215-644.png]] //Cover// command from [[image:1585060063357-318.png]] tabmenu and choose [[image:1585060072153-643.png]] //Define//.
26 [[image:1585060082951-894.png]]
27 Figure: Cover toolwindow
28 1. Set the cover type if it is slab/roof type [[image:1585060101700-230.png]] or wall type [[image:1585060111584-533.png]]
29 [[image:1585060121539-886.png]]
Fredrik Lagerström 13.1 30 Figure: Cover types
31 1. Choose a **geometry** definition method for the cover’s plane.
Fredrik Lagerström 40.1 32 Note: In case of arc geometry in wall covers, you must set the maximum angle between neighboring covers at [[image:1585060362726-569.png]] , since arced walls are replaced with straight sections.
33 1. Set the load bearing directions with [[image:1585060382335-944.png]].
34 [[image:1585060394058-305.png]]
Fredrik Lagerström 13.1 35 Figure: Setting the load direction (monodirection)
Fredrik Lagerström 40.1 36 1. Defining the supporting structures with [[image:1585060467129-210.png]].
Fredrik Lagerström 13.1 37 After defining the supporting structures, the equidistant lines will appear with the load distribution zones.
Fredrik Lagerström 40.1 38 [[image:1585060489462-497.png]]
Fredrik Lagerström 13.1 39 Figure: Defining cover’s supporting structures
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Fredrik Lagerström 40.1 41 |[[image:light.png]]|Activating the //Auto supports// checkbox will automatically determine the supporting structures for the cover. These can be modified later.
Fredrik Lagerström 13.1 42
43 When using //Auto supports//, the following objects or elements will be recognized as supports if they are located in the cover’s plane:
44
45 * Beams and columns (including fictitious ones)
46 * Line supports and line support groups
47 * All inner and outer edges of slabs and walls (also working with fictitious ones)
48 * all point elements (such as point supports)
49
50 The Supporting structures and the Load bearing direction commands can be used to alter the automatically determined specifications.
51
52 To automatically assign supporting structures to previously defined covers simply use //Select supporting structures automatically option//.
53
Fredrik Lagerström 40.1 54 [[image:1585060563556-292.png]]
Fredrik Lagerström 13.1 55
Fredrik Lagerström 46.1 56 = {{id name="Building cover"/}}Building cover =
Fredrik Lagerström 13.1 57
58 With this command frequently required shapes such as flat roof, ridge roof, or inclined roof can be very quickly defined.
Fredrik Lagerström 40.1 59 [[image:1585060602453-760.png]]
Fredrik Lagerström 13.1 60
61 Figure: Starting Building cover command
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Fredrik Lagerström 40.1 63 Flat roof: [[image:1585060642081-539.png]] and its height parameters: [[image:1585060646507-939.png]]
Fredrik Lagerström 13.1 64
65 No negative value is accepted for either h or h’.
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Fredrik Lagerström 40.1 67 Lean-to:  [[image:1585060653815-802.png]] and its height parameters: [[image:1585060659213-907.png]]
Fredrik Lagerström 13.1 68
69 No negative value is accepted for either h or h’.
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Fredrik Lagerström 40.1 71 Ridge-roof: [[image:1585060670036-420.png]] and its height parameters: [[image:1585060677970-566.png]]
Fredrik Lagerström 13.1 72
73 Negative values is accepted for h’.
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Fredrik Lagerström 40.1 75 |[[image:warning.png]]|Keep 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.
Fredrik Lagerström 13.1 76
77 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.
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Fredrik Lagerström 40.1 79 [[image:1585060734040-221.png]]
Fredrik Lagerström 13.1 80
Fredrik Lagerström 40.1 81 |[[image:warning.png]]|All building covers are monodirectional by default except the upper surface of flat-roof. (They can be changed one by one after definition.)
Fredrik Lagerström 13.1 82
Fredrik Lagerström 40.1 83 By clicking on [[image:1585060771815-214.png]] (Properties) you can change the ID and the height parameters of the building cover:
84 [[image:1585060779438-406.png]]
Fredrik Lagerström 13.1 85
Fredrik Lagerström 40.1 86 You can explode the building cover with [[image:1585060792066-627.png]], and then edit the covers one-by one.
Fredrik Lagerström 13.1 87
88 The //Auto supports// function is available for building covers as well.
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