# stair riser variation between stairs and landings

I'm designing a stairs in a very tight space that has an upper landing and a lower landing, each segment requires a 90 deg turn. If the landing riser heights are different from the main run - does this present a hazard? If so - why?

Presently the upper landing is 10.5" drop, followed by steps of ~9.5", and back to 10.5" on the lower. The stair runs are 11.5"

• My thought is - once the walking gait pattern in broken - you effectively have a different stairs. For example, the stairs in my home go to a small landing at the front door - then there is a step out of the front door that drastically different height. 10.5 is a large drop (although the step stool I use is 14") - but you fall into the landing - not the stairs. I'm aware of the code - but by code a stairs are not possible - so I've been using a ladder. Code is also based on average size of people - how well would code stairs work for small or large people? Apr 20, 2018 at 13:54
• What do you mean by the "landing risers"? Are you referring to entire stair runs between landings, or the single rise above or below a landing? Apr 20, 2018 at 13:56
• @isherwood The first step down would be 10.5", followed by a 90 deg turn, followed by steps ~9.5", followed by a 90 deg turn, followed by what I call 2 steps to the floor. Maybe riser isn't the correct word - so I call them drops. Apr 20, 2018 at 14:01
• I think the answer has been given - diy.stackexchange.com/questions/38128/… Apr 20, 2018 at 14:06
• If that's a duplicate, please delete your question. Apr 20, 2018 at 14:12