Number of risers17
Riser height171 mm
Tread depth225 mm
Tread depth 225 mm is less than the minimum 254 mm.
Standard: IRC R311.7.5.2
With 17 risers and 16 treads, no combination meets both the riser and tread minimums for this run. A total run of at least 4064 mm would resolve it.
2 x riser + tread is 566 mm, outside the comfortable range of 630 mm ± 30 mm.
All 17 risers are 171 mm — splitting the total rise evenly leaves a difference smaller than the display precision, so every riser is effectively identical.
Dimensions
Stringer length4,623 mm
Stair angle38.9°
ATotal rise2,900 mm
BTotal run3,600 mm
Cutting dimensions
First riser cut139 mm
Throat depth150 mm
Tread board width250 mm