Comfortable Stair Riser Height
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We would need change the stair tread depth to make a 37 slope stair that has an acceptable 7 inch riser height.
Comfortable stair riser height. Staircase riser height translates to the distance you move your foot either up or down from one step to an adjacent step. Stair riser heights the riser height shall be measured vertically between the leading edges of adjacent treads. I have built residential stairs to maximum riser height from 7 75 to 8 25 inches depending on the code for an area.
The total length of the stair rise plus the run r r should equal around 18 inches with no more than a 1 inch deviation. On my first stair r r was roughly 15 inches way too far from 18 to be comfortable or safe. Building codes generally require guards for stairs that have a total rise of more than 30 inches above the floor and require that these guards be at least 34 inches 86 36 cm in height measured from the top of the treads.
Shop for products for your entry on houzz. In no instance should a stair be designed in a single run with a total rise of more than 12 feet. 7 3 4 inches maximum.
Maximum stair step riser height 7 75 or in some codes 8 minimum stair step riser height. Also twice the rise plus the run 2r r should be equal to 25 inches also with a 1 inch deviation. The irc limit gives an r r of 17 pretty darn close to 18.
I relied on the 18 rule for several years until i met another carpenter who insisted that a better measure was that twice the rise plus 2r r the run should be 25 inches. There are a few calculations that can help determine whether a stairway s rise and run will feel comfortable during use. As general rules of thumb for achieving comfortable relationships between riser and tread dimensions the following formulas can be used.
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. 4 step riser height uniformity 3 8 variation between successive step surfaces or in some codes 3 16 4 8 mm. This should be no more than 7 3 4 inches.
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