Average Stair Tread Size

The result was a disastrously uncomfortable stair with treads too short for adult feet.

Average stair tread size.

Harvard university lists typical tread sizes between 20 and 28 7 cm 8 and 11 1 2 inches. On the first stairs i built i sized them for a 1 8 riser and a 2 8 tread. The walking surface of each step is known as the tread. For people with disabilities the minimum tread size is 27 5 cm 11 inches which would be the effective minimum and likely the average size of the tread for any stairs built for public use.

Stair treads come in a variety of colors styles shapes and sizes. The stair tread is the surface area of each step within the stair assembly. Stair details refer to the standard requirements for each of the various components of a flight of stairs. This free stair calculator determines stair parameters such as rise total run and angle stringer length based on height run tread and headroom requirement.

Unit run is carefully considered based on both safety and cost. If you think about it you. Because they only sit on the top of the stair the length of the tread is limited to the size of the average step. The average stair tread size by keith allen hunker may earn compensation through affiliate links in this story.

Regulated by building codes stair details specify the sizes of risers and treads stair widths the placement of handrails and guardrails and construction methods for fabricating stairs. Unit run is the horizontal measurement of from the front to the back of a single stair which is known as the tread standard code requires that each stair tread fall between 9 inches and 11 inches 22 9 cm and 27 9 cm to allow people to safely ascend and descend stairs. Further the tread measurement of every tread in a stairway should be as close as possible to identical. The riser height max 7 ins 19 7cm is limited by the way in which we come down the stairs.

The greatest tread depth within a flight of stairs cannot be more than 3 8 inch larger than the smallest tread depth. Explore a number of building and housing related calculators as well as hundreds of other calculators involving topics such as finance math fitness health and more. Length most stair treads are not made to wrap around the lip of the stair. The tread size min 10ins 25 4cm is dictated by the average adult foot size although it is not necessary to be able to fit your entire foot on a tread in order for walking up the stairs to be both comfortable and safe.

The distance between each step is referred to as the rise.