This industrial-style staircase traces the contoured path of a trefoil knot.

This model is designed for resin printing, but if you scale it up enough you just might be able to print it with an FDM printer! Pictures show the original model scaled a 50%, 100% and 200%.

Three versions are provided. “Ring Base” is the most sturdy, “Flat Base” has less contact with the build plate, and “Plain” has no base.