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Design of stair cases is done considering the length of flights, step rises and application. When designing a stair case, the following proportions will be maintained in order to achieve a comfortable walk:

2* rise+ 1 going = 600

Recommended sizes for stairs:

Category

Rise

Going

Sum (g+2r)

Pitch

Clear width

Min
(mm)

Max
(mm)

Min
(mm)

Max
(mm)

Min
(mm)

Max
(mm)

Min
(deg)

Max
(mm)

Private stair

100

220

225

350

550

700

41.5

800

Public stair

100

190

250

350

550

700

38

1000

Assembly stair

100

180

280

350

550

700

33

1000