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ArchiCAD Tip - Level Dimensions and Gravity

Level Dimensions are a special form of dimension that can be placed on a Floor Plan.
They can display the height/Z-axis value of an element.

You can place a level dimension in a Floor Plan by choosing the Level Dimension tool from the Document section of the main Toolbox (see below)

The settings of the Level Dimension (e.g. Text size, Layer, Pens etc.) are setup as normal in the Level Dimensions Settings dialog.
By clicking over any element in the Floor Plan, the dimension will be placed/shown, but by default the dimension will only show the default value of 0.000, which is not very useful.

This then introduces the idea of 'Gravity' in ArchiCAD, the 'Gravity' option is found on the main toolbar (see below) and has three different settings:

In practical terms, Gravity allows an element to 'fall down from a height' until it 'hits' an element below. This is a very useful when used in conjunction with level dimension as it allows you to display Z-heights of

  1. Slab Levels
  2. Points on a Roof (e.g. Ridge/Eaves Heights)
  3. Points on a Mesh

The sample screenshot below shows various dimensioned points on a roof surface.
Importantly, Gravity can only be applied to new dimensions, but once placed the dimension will track/update to changes made to the element's height/Z-axis position.
This combination of Level Dimension and Gravity can be very useful in producing additional relevant information applied to Floor Plan drawings.