Hello all,

I'm constructing a large LNG tank and I need help on making a helix staircase that goes up it with the guard rail and possibly the small set up at the top if I can make it, similar to the attached picture. I'm unsure about how to start it though as I've never done helical extrusions, It's possible to do a small rectangular extrusion every x amount of distance over and x distance up, right?

Also on a unrelated side note, is there any simplistic way that allows two people to work on one project at the same time like google documents? Because I feel that would be amazing.

Thanks.