Calculation should include
- the total rise and run
- individual rise heights and run lengths, limited by building code maximums
- the total rise divided by individual step rise for the total step number.
IRC: Chapter 3 covers egress and life-safety requirements and covers stairs rise, tread, railings, and guard rails that run the length of stairs, and other details.
Process/Skill Questions:
- Why is there a minimum rise or run for stairs?
- What problems could arise from an inequality in rise dimension?