NFR Tell me why

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Peyton00

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What's the reason for the interesting tread pattern on these stairs?
Screenshot_20241026_181305_Facebook.jpg
 
2 very dis-similar height people in the same house? Shorter person uses the left foot on the left treads and right foot on the right, taller uses treads from only one side. Or maybe it's a next-level slinky course?
 
They are all the same hight.
Left foot, right foot
Left foot Right foot
Very ergonomic to everyone but the US
 
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Alternating tread style I believe, not ships ladder.
Building code does allow under specific circumstances, typically not for residential unless recent change.
If old house before codes is allowed.
 
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A govt contractor?

(I can give answers too.)
 
They are all the same hight.
Left foot, right foot
Left foot Right foot
Very ergonomic to everyone but the US
It's not an optical illusion, and I think you need better glasses.
They are not all the same height.
 
It's not an optical illusion, and I think you need better glasses.
They are not all the same height.


Yes they are, camera angle is deceiving, maybe you need new glasses or perspective.
This is a very common staircase in Asian countries and modern build designs. I have seen dozens of examples on YouTube all over the world.
 
Ok...so step up and turn right. Step up and do a 180. Step up and do a 180. Step up and do a 180... I'm taking the elevator.
 
I think SculpinSwinger's got it. I haven't heard the term Captain's stairs, but it makes sense. Each tread complies with the depth per rise requirement, but you can get the desired height in a shorter run using the overall steeper angle. Pretty clever in that context. Also, on a personal level, I used to be annoyed that the rise per step was too short and routinely took steps two at a time. I still do when going up the stairs, but in deference to my age I take the steps one at a time when going down.
 
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