10) What is the minimum width of a stair?

11) What is the stairs flight having an opening between two flights?

12) What is the minimum thickness range of stringer used in wooden stair?

13) What is the number of steps required if the Height of floor is 3.0 m assume the rise is 15 cm for a single flight?

14) What is the number of treads if the height of floor is 3.8 m and assume rise is 14 cm for double flight?