Cross section showing the work-out machines: stationary bike, smith machine, multi-functional weight lifting machine, pull-up bar, etc.
The columns supporting the overhang are also shown in height.
What should I upload in this Develop Solutions step?
Consider uploading images (JPG, GIF) of your rough digital model. It's ok if your model is still a work in progress. Show an axonometric or perspective view with people, which will help others understand the scale of your library.