I've been working on the bridge and platform this past week, and made quite a bit of progress.
The biggest challenge of this piece is that I wanted the bridge platform to 'float' over the ruined building. The idea being that where ever this happens to be in the underhive, a rotted out section of makeshift gantries crossing a anchient administratum ruin wasn't going to cut it anymore. The powers that be had the ruin 'leveled' and then the platform and bridge installed. If you build it, charge the underhivers to use it!
In the underhive the powers that be are of course the gang that controls that section of the sump... so I wanted the construction to resemble that. The platform and rigging is solid and suitably industrial, but the keepers hut is ramshackle. The bridge stolen from somewhere else and incorporated into the structure.
But none of that explains the 'float' part.
Well, how do you keep your new toll road mostly level? Build it on stilts, of course.
...aaand it's big. I mean, it got away from me from the go, with the footprint being larger overall than I envisioned. It's also more squat than I wanted, but at the same time it ended up being taller in the super structure. It had to be to 'work' properly. I set the drawbridge and the industrial ruin from a few posts back on the floor and took a picture to really get a sense of what I've got.
Eventually I'll get more work done on the industrial ruin, too.