Double flight Staircase type 4
Staircase direction
Left to right
Right to left
Waiting step
Before going up only
Before going up and down
Flight width
(a)
Riser height
(b)
Thread depth
(c)
Gap in between
(d)
Number of risers in first flight
(e)
Number of risers in second flight
(f)
Slab thickness
(g)
Stringer width
(h)
Stringer depth
(i)
Handrail guiding lines offset
(k)
Handrail guiding lines height
(l)
.