Cross section forces of a structure under dead weight are used to scale the cross section heights in a rectangular grid of beams. Contains a trick regarding the flexible definition of support positions. Set the Grid to 3 x 2 for the to view with the TRIAL version.
Get the grasshopper definition here: 05_CrossSectionHeightsFromMoments.gh
This example uses Karamba3D 1.3.2.
See the Smooth Cross Sections Heights from Moments example to see how the beam heights can be smoothened and then reanalyzed in Karamba3D.