40 Degree to 45 Degree
45 Degree to 60 Degree
25 Degree to 30 Degree
30 Degree to 40 Degree
.
Commode
Splayed
Bull nose
Dancing step
Barrister
Stair
Landing
Stringer
Flier
Going
Tread
Riser
Geometrical stair
Helical stair
Half turn stair
Three quarter turn stair