Q: I want to install hard wood flooring in my kitchen. I have a railing and a step into my family room, with a piece of wood at top (that’s in the kitchen). How do you deal with this?
A: It sounds like you are saying that the ballister system is anchored into a sole plate. If you are installing a 3/4 thick floor and that sole plate is 3/4 then you can just run right off that. If it is not that thick you will either have to remove the ballisters or install off of or up to the sole plate and then use a tiny piece of beveled trim to hide the board edge. You will likely need to install a short length of stair nosing across the opening to the step.