During the planning process we had to change details of the pylon's design.
We
got several tips from other construction experts, thinking that the
first design concept might not be stiff enough and vulnerable to
tilting. This is why we decided to replace the former straight
reinforcing tree trunks with two inclined ones on each side.
When
we first planned the pylons we abandoned this idea because
additional foundations are necessary. However since so many of our
advicers shared our concern about the initial construction being to
slender for the bridge's length, there was no other way than to opt for
the additional foundations.
First draft
Revised design