Standard Stair Tread Riser Height

Building codes generally suggest that the maximum height of a riser be 7 75 inches 19 7 cm.
Standard stair tread riser height. 7 riser height tread depth y 0 7535 37 slope. Step riser specifications riser height 7 75 or in some codes 7 0 or in canada 8 25 maximum and 4 inches 102 mm minimum. We would need change the stair tread depth to make a 37 slope stair that has an acceptable 7 inch riser height. 39 fr 23502 june 27 1974 as amended at 43 fr 49744 oct.
This should be no more than 7 3 4 inches. You can find some more information here as well on other stair related dimensions. As general rules of thumb for achieving comfortable relationships between riser and tread dimensions the following formulas can be used. Tread inches 2x riser inches 24 25 26 for exterior stairs riser inches x tread inches 72 75.
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. 7 3 4 inches maximum. A stair riser is the back vertical part of a step. 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.
Maximum 7 3 4 inch stair riser height. It is not the physical height of the riser because this excludes the thickness of the tread. The number of risers not the number of treads is used to determine the number of steps that comprise a staircase. 49 fr 5321 feb.
Handrail graspability to be either type i or ii with a minimum 1 1 2 inch clearance from a wall. Minimum 10 inch stair tread depth with nosing or minimum 11 inches with no nosing. The rise or height of a step is measured from the top of one tread to the top of the next tread. Some codes specify slightly taller stair risers from 8 to 8 1 4 canada for example.
The result was a disastrously uncomfortable stair with treads too short for adult feet. Vertical clearance above any stair tread to an overhead obstruction shall be at least 7 feet measured from the leading edge of the tread. 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. Handrail height to be placed a minimum 34 inches to 38 inches.
Maximum 12 3 vertical height rise for a flight of stairs. Standard step height on average american architects have used a standard stair height of 7 5 inches. Mike guertin s prohome adjusted dimensions. Staircase riser height translates to the distance you move your foot either up or down from one step to an adjacent step.