Seen here are some examples of Closed Rise, Open Rise, Closed String, Concealed String and Cut String stair designs.
Closed rise stair:
Standard stairs with tread & rise housed into the stair string on either side. Needs soffit lining or cupboard underneath after installation.
Open rise stair:
No rise between the treads, so you can see through them. Lets light through the stair – a great idea for small spaces, or for when stairs go over another staircase.
Closed string stair:
Closed string stair is where you can see a beam on the side of the stair closing off tread & rise profile. Also generally where the balustrade is attached.
Concealed string stair:
Generally, where the tread & rise goes between two walls. No stringer visible when walking up the stair. Can also incorporate a shadow line nosing at the tread & rise junction.
Cut string stair:
Where you see the profile of the tread & rise from the side and the string is cut to go under the tread & rise, thus giving a saw tooth effect.
Mono Stringer stair
A mono stringer stair uses a single ‘beam–like’ stringer that supports the centre of the treads
from below and no risers are present.