Stair riser heights shall be 7 inches 178 mm maximum and 4 inches 102 mm minimum.
Stair tread requirements.
Stair tread depths shall be 11 inches 279 mm minimum.
You will need at least two per staircase.
Treads should not slope more than 2.
The riser height shall be measured vertically between the leading edges of adjacent treads.
If no nosing solid risers tread minimum is 11.
1910 25 b 3 stairs have uniform riser heights and tread depths between landings.
Spiral stairs must meet the vertical clearance requirements in paragraph d 3 of this section.
The riser height shall be measured vertically between the leading edges of adjacent treads.
Erectastep perfectastep current erectastep tread depth i e.
Vertical clearance above any stair tread to any overhead obstruction is at least 6 feet 8 inches 203 cm as measured from the leading edge of the tread.
Tread depth on stairs must be a minimum of 10 not including the nosing.
Stair tread depths shall be 11 inches 279 mm minimum.
The stringer is the entire sawtooth shaped member upon which risers and tread rest.
A riser is the vertical measurement of each stair.
Stair code example source boca 2001 stair construction code details.
Handrails continuous are required on at least one side of flights of stairs with 4 risers.
The tread depth shall be measured horizontally between the vertical planes of the foremost projection of adjacent treads and at a right angle to the tread s leading edge.