[seismic]

Equilibrium equations is the great need of building
The loadings (external or static) will always exist.
We can not eliminate loads.
But we can drive loads in sections that are stronger than other sections.
Vertical cross sections of the columns are stronger than horizontal cross sections of the columns.
All structures with nodes lead loads in the horizontal cross section of the column.
The roof - soil compaction deflects lateral earthquake loads in vertical sections of pillars. These sections are stronger and withstand more loads.