I wanted to call the bridge Qwi but i was told not to by people with low pun tolerance!

The asymmetric design is intentional - I wanted to do something that matched with the idiosyncratic style of the rest of the buildings. I guess its one of those love or hate things - but i wanted it to be different.
One end of the bridge isn't unsupported, it's designed to mate to other buildings etc, so when it's installed (
like the prototypes in this link) it doesn't look unsupported. The holes in the ends of the bridge accept 4mm magnets that hold the bridge in place.
The design is also intentional to allow a gate component to be made to fill in the arch allowing an asymmetrical fort gate to be made.