1.2 Beam, Mathilde, A web of beams

These beams are created as a result of the circular columns. 
You might say that they creates a web of beams. 

It creates a pattern that connects the columns. This is the case both in the top, and in the bottom, which furthermore creates a space between the roof- and floorbeams.

The forces inside the beams runs with the straight lines. The beams with an elbow, are more weak and they just play an aesthetic part of the beam structure.