The riser height shall be measured vertically between the leading edges of adjacent treads.
Stair tread requirements.
Risers can either be enclosed or left open as in deck stairs or basement.
Erectastep perfectastep current erectastep tread depth i e.
Standard stairs tread depth new osha code 1910 25 c 3 have a minimum tread depth of 9 5 inches 24 cm.
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.
If no nosing solid risers tread minimum is 11.
And 1910 25 c 4 have a minimum width of 22 inches 56 cm between vertical barriers product lines affected.
Spiral stairs must meet the vertical clearance requirements in paragraph d 3 of this section.
Treads should not slope more than 2.
Stair tread depths shall be 11 inches 279 mm minimum.
Stair tread depths shall be 11 inches 279 mm minimum.
The riser height shall be measured vertically between the leading edges of adjacent treads.
The stringer is the entire sawtooth shaped member upon which risers and tread rest.
Stair code example source boca 2001 stair construction code details.
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.
A riser is the vertical measurement of each stair.
You will need at least two per staircase.