Stair Tread Size Mm

The riser height max 7 ins 19 7cm is limited by the way in which we come down the stairs.

Stair tread size mm.

When ordering or specifying tru weld bar grating treads please confirm. Enter the length and width of your biggest foot into our size calculator. Standard stair tread dimensions. However the americans with disabilities act ada lists the minimum tread size as 11 inches which would be the effective minimum and likely the average size of the tread for any stairs built for public use.

Type bar size and surface of grating type of nosing checker plate is standard width of tread. Size min length max length max width. 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. Junior 12 13.

Junior 11 12. Junior 10 11. Steep stairs make climbing more tiring and dangerous while shallow stairs are awkward and inefficient for our human stride. Here is a drawing detailing our standard stair tread and riser dimensions.

Length of foot mm width of foot mm calculate. Mm imperial inches metric mm imperial inches 5 157 6 3 16 64 2 1 2 n a n a 6 187 7 3 8 114 4 1 2 n a n a. These dimensions may be useful when laying out a staircase or if you have general questions about the size and shape of a traditional tread or a retro tread.