The rise or height of a step is measured from the top of one tread to the top of the next tread.
Standard stair tread riser height.
The result was a disastrously uncomfortable stair with treads too short for adult feet.
Standard step height on average american architects have used a standard stair height of 7 5 inches.
A stair riser is the back vertical part of a step.
Some codes specify slightly taller stair risers from 8 to 8 1 4 canada for example.
At stair riser specifications and at stair dimensions width height you ll read that stair risers should be 7 inches 178 mm maximum and 4 inches 102 mm minimum.
Building codes generally suggest that the maximum height of a riser be 7 75 inches 19 7 cm.
Handrail graspability to be either type i or ii with a minimum 1 1 2 inch clearance from a wall.
Tread inches 2x riser inches 24 25 26 for exterior stairs riser inches x tread inches 72 75.
It is not the physical height of the riser because this excludes the thickness of the tread.
Staircase riser height translates to the distance you move your foot either up or down from one step to an adjacent step.
As general rules of thumb for achieving comfortable relationships between riser and tread dimensions the following formulas can be used.
This means your stair risers should be less than or equal to 7 3 4 inches.
The number of risers not the number of treads is used to determine the number of steps that comprise a staircase.
Rise r 8 run r 9 1 4 r r 17 1 4 good 2r r 25 1 4 almost perfect stairs will be comfortable on the first stairs i built i sized them for a 1 8 riser and a 2 8 tread.
7 riser height tread depth y 0 7535 37 slope.
Handrail height to be placed a minimum 34 inches to 38 inches.
Maximum 12 3 vertical height rise for a flight of stairs.
Minimum 10 inch stair tread depth with nosing or minimum 11 inches with no nosing.
7 3 4 inches maximum.
49 fr 5321 feb.
Maximum 7 3 4 inch stair riser height.
39 fr 23502 june 27 1974 as amended at 43 fr 49744 oct.
On stairs built inside the average step length is 9 inches tall while outside steps have an average length of 11 inches tall.
You can find some more information here as well on other stair related dimensions.
More exactly no more than 7 3 4 inches 19 7cm for the riser vertical and a minimum of 10 inches 25 4cm for the tread horizontal or step.
Vertical clearance above any stair tread to an overhead obstruction shall be at least 7 feet measured from the leading edge of the tread.
This should be no more than 7 3 4 inches.
The general rule in the us is 7 11 a 7 inch rise and 11 inch run 17 78cm 27 94cm.