Civil Eng > Sem 8 > Design and Drawing of Reinforced Concrete structure
Open well staircase
This type of stair consists of two or more flights arranging a well or opening between the backward and forward flights.
When all the steps are difficult to arrange in two flights, a short third flight of 3 to 5 steps may be provided along the direction perpendicular to the hall.
A pen well staircase mostly adopted in lift