Look at the picture, I am not sure if I understand the stairs' anatomy correctly.
Do we say "main handrail", "subhandrail", "a railing" as shown in the above picture?
A flight of stairs might have 1 main handrail and some subhandrails. It might also have many railings.
My child is too short to hold the main handrail. In this case,
Is it correct to say "Please hold on to the subhandrail and railings while walking up the stairs"?