A huge thanks to dutchmogul for providing the source files on Tinkercad. This was my first time using it and I have to say it is very easy to use. These models can be ungrouped and reassembled into just about any configuration.
My sons and I love the original catwalks (https://www.thingiverse.com/thing:1481146) and my youngest asked for a 90 degree and a T junction, so here they are. I've been printing a lot of gaming pieces and I'm trying to give back to the community. If you like these please thank the original creator for providing the source files.