Stair Risers & Treads

Responding to the movement of the human body, the sizes and relationships of stair risers and treads are regulated to make vertical motion safe and easy. Steep stairs make climbing more tiring and dangerous, while shallow stairs are awkward and inefficient for our human stride. Buildings codes have been created to control the minimum and maximum measurements of risers and treads.

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”

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The typical Risers & Treads has an overall height of and body length of . An average Risers & Treads weighs between and has a typical lifespan of .
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The Stair Risers & Treads has a height of , width of , depth of , and weighs . The Stair Risers & Treads was released in .

Responding to the movement of the human body, the sizes and relationships of stair risers and treads are regulated to make vertical motion safe and easy. Steep stairs make climbing more tiring and dangerous, while shallow stairs are awkward and inefficient for our human stride. Buildings codes have been created to control the minimum and maximum measurements of risers and treads.

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”

Common Questions
Common Questions
Common Questions

Details

*Under Development*

Height: 
Width:
Depth:
Length:
Weight:

Riser Height: 4" | 100 mm min.; 7" | 180 mm max.
Tread Depth:
11" | 280 mm min.
Nosing Protrusion: 
1.5" | 38 mm max.
Nosing Radius: .5" | 13 mm max.

  • Riser and tread dimensions should be continuously uniform for safety; building codes limit variation to 3/8" | 10 mm
  • The underside of risers should be sloped or have a 60° angle minimum between nosings and the horizontal surface
  • Open risers are not allowed under ADA guidelines

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