Stairs must satisfy strict building codes that is meant to ensure safety and climbing comfort. We are so used to uniform, professionally built staircases that the slightest discrepancy between steps creates a tripping hazard. Tall step is making climbing hard. Shallow steps are uncomfortable and dangerous.
So, since there is so little room for errors, building that have stairs requires careful layout and tricky calculations. You can start by consulting your building codes office for local guidelines. Take your plenty of time to plan correctly. Now take a look at these 40 stairs atrium architecture model below.