Originally posted by Gladi8er65:

Building in Valheim is totally NOT based on real world physics. Pillars, beams, trusses etc, do not provide support like RL counterparts would.

Valheim has a structural "stability" system and the following video can maybe help understand it.

https://www.youtube.com/watch?v=gD3YQGufXgA

"Totally" is clearly an exaggeration. The fact that objects have limits is based in physics, that they fall to the ground is based in physics and there are cases where supports are needed, specifically when building with stone and using the arch.