The Sub Areas dialog box lists all subordinate areas which are calculated for the main object. Sub areas like openings (windows or doors) in walls are automatically recognized by the system and calculated according to the rules defined in Calculation Settings. You can manually define (add or subtract) sub areas.
- Click
. - In the Calculate Room Quantities dialog box, click Calculate.
- Click View/Edit Results to view and edit the calculated room quantities.
- In the Room Quantities dialog box, under Select Room, select a calculated room (space) and view the quantities.
- Under Room Quantity, select the calculated room quantity.
- Click Sub Areas.
The Sub Areas dialog box is displayed. The Sub Areas dialog box is only applicable for surfaces of walls, floors and ceilings. The dialog box does not exist for room perimeters and furniture objects.
- Calculated Quantities
- Displays the calculated main surface of the object.
- Sub Areas
- If there are sub areas in the object which were automatically detected, they are listed below the "Main Surface" row.
- Example Openings
- In the example, the door and window in the wall are automatically detected as sub areas:
- as "Material" is automatically taken the material of the main surface, as the openings do in fact reduce the material requirement for this wall surface
- as the openings are reducing the wall surface, the calculation sign "minus" is set
- length, width, height, and area are automatically calculated and cannot be changed
- Example Column
- A column touching the wall is listed as sub area:
- the column automatically gets the same material as the main surface
- as the column surface increases the wall surface (and thus the material requirement), it gets the calculation sing Plus which means it is added
- German VOB Standard
- Only when using the Calculation Setting - VOB Calculation Standard (Germany). This column is only displayed when VOB standard is used. It also reflects whether the VOB settings is ignored.
- Count
- Reports the number of the recognized sub areas. If sub areas are identical, they are summarized. If they are different, then is created a separate entry for each sub area.
- Object Name
- Name of a calculated object.
- Lists the materials assigned to the sub area.
The material of the main object is transferred to all automatically detected faces and sub areas. For example, a wall object has the Plaster surface material. There are two windows in the wall which are automatically detected as sub areas and subtracted from the area of the main object. In order to reduce the Plaster material of the main surface correctly by the subtracted window area, the sub area automatically gets the same material as the main area with the calculation sign minus.
- Override Material
- Apart from the global assignment of materials by surface material styles or by object, you can also define individual material overridings.
Click Materials browse button. The Select Materials is displayed and you can assign other materials for this particular object. For instant control, overridden materials are displayed bold.
- Calculation Sign (+/-)
- The calculation sign +/- shows whether a sub area is subtracted from (minus) or added to (plus) the main area. Automatically detected sub areas like openings in walls are by default in (-), which means they are subtracted from the wall surface as they are reducing the material requirement. Columns, however, are automatically (+), as they are added to the wall surface and therefore increase the material requirement. Nevertheless, you can still change the calculation sign manually, defining by how to treat the sub area. The same applies to manually or numerically added objects:
- In the column "+/-" click on the arrow symbol and select by Plus or Minus whether the sub area is added to or subtracted from the main surface. The material requirement is calculated accordingly.
- The calculation sign +/- cannot be changed for the main area, it is always plus.
- Dimensions
- The dimensions are different for each object type. The values cannot be edited, but are automatically calculated.
- Inner Reveal
- This value is only calculated for wall surfaces and displays the inner reveals for the openings of the surface.
- ID
- The Quantity ID is a unique identifier for the calculated objects.
- Room ID
- Displays which space an opening belongs to.
- Ignore
- Allows to exclusion of objects (automatic or manual) from the quantity calculation. Unmarked objects are not calculated and not displayed in the export files.
- Type
- Displays how a room quantity was detected.
- Automatic: Automatically detected by the system and cannot be deleted manually.
- By Object: Manually selected by objects and can be deleted manually.
- Add Object
- Adds more sub areas to the automatically detected ones. For sub areas of walls, floors, and ceilings, you can:
- select closed contours from detail or model lines (the area is taken from the contour), or
- add a numerical row in the table from the context menu in which you simply enter an area value numerically.
- Add Row
- Adds a numerical row to the table. You can define an area value numerically, without having an constructive reference in the drawing.
- Calculate According to VOB
- The VOB Calc. column shows whether the sub area is calculated according to the current VOB calculation options or if the sub area is ignored because it is smaller than the limit defined in the VOB calculation settings.
The setting is done automatically, depending on the calculated size of the sub area and the current Calculation Settings - VOB Calculation Standard (Germany).
For example, the calculation settings are set for a "VOB calculation of masonry works." For windows or doors smaller than 2.5 m², the VOB Calc. are set to No (not calculated according to VOB). Otherwise, VOB Calc. is automatically set to Yes (calculated according to VOB).
If you want to change the calculation rules globally, then change the Calculation Settings and perform the Room Quantities Calculation again. Then, the openings are calculated anew.
If you only want to change single objects, for example an adjacent window and a door which each are smaller than 2.5 m², but due to the constructive situation are forming a unit, then simply change the toggle manually.