Building our tallest structure

Using Newton's law, we were asked to build our own tallest structure.
Our own tallest structure conveyed great height...yet it wasn't enough to overcome the concept of standing.
As you can see in the picture below, although the tower had enough height, it required Patrick to support it as we took our group picture.

The reason why we believe our tower didn't stand is simple; our base was too light. If we'd had a stronger base, possibly one that was filled instead of hollow, I believe that our structure would've had a good chance of standing against gravity.
Also, extra support along the sides acting as wire to bind the tower to the ground would've been useful, although illegal, under Mr. Chung's rules.