Welcome to Just Answer.
The stair railing is required to be between 32-34 inches high, measured from the tips of the stair tread nosings. 36 inches high on any landings/ horizontal surfaces. 36 inches clear between railings.
You cannot allow a 4 inch sphere to pass thru any of the openings, including vertical or horizontal spindles/ ballusters. So space them out, so that there is less than 4 inches between spindles or posts. This includes the triangular space between each stair and the bottom rail of the stair railing.
If you should need further help on this question, please reply to this post.
It is my objective to make sure that your question is answered to your complete satisfaction.
Best of Luck,
Please click the green "ACCEPT" icon, if you feel that I have met this requirement.
This is a FEE based website & your payment allows us to be here for you.
PLEASE LEAVE FEEDBACK; it is important to me
BONUSES are appreciated.