Spiral Staircase Building Question?

[AndyF]

I am building a quarter quadrant (90 deg) staircase for my front porch. My stairs will radiate from a fixed apex on the right like a fan would. I want to access the side of the porch from the front of it to save driveway area.

It measures 49 inches in radius (90Deg) and curves and rises to the right, and is 32inches high. There will be only 4 steps of 7.5 inches high each and all steps of course are triangular. A hand rail will cap the left hand of the stair.


My concern is the narrower apex of the steps on the right as they diminish to nothing. I noticed that this is the norm in spiral stair design, and I suppose people know enough to stay in the wider tread area. But all the same someone could step off the narrower treads by mistake. Also, one day this step will be used as a business entrance.


Is there a valid concern here?


Thanks.


Andy

 

[eh1eh]

That could be a problem. Try making your inside radius larger. That is to say don't run the steps until they diminish to nothing. Stop them short of that so thay end while still having some width. Matbe put a planter in the resulting round space.

 

[Unforgiven]

As well contrast the edge of the step from the rest to help with angle of ascent. Be careful come winter and the snow and ice situation.

 

[AndyF]

Great ideas, thanks folks.!

AndyF