4 inches4 inches.

## What is the minimum height of a step?

4 inches

2 Riser height and tread depth. Stair riser heights shall be 7 inches (178 mm) maximum and **4 inches (102 mm)** minimum. The riser height shall be measured vertically between the leading edges of adjacent treads.

## What is the normal height of steps?

7.5 inches

The standard stair height for American architects is **7.5 inches**. Outside steps have an average length of 11 inches tall, while inside steps have an average length of 9 inches tall.

## What is the maximum height of a single step?

Standard Stair Riser Height Requirements

OSHA 1910.25(c)(2) requires standard stairs to have a maximum riser height of **9.5 inches** (24 cm). IBC 1011.5. 2 requires that stair riser heights shall be 7 inches (178 mm) maximum and 4 inches (102 mm) minimum.

## What is the minimum length of a stair?

The minimum, in most places, it is **2 feet 8 inches**. Minimum width of tread without nosing shall be 0.833 feet for residential building and other building it will be goes upto 1 feet. Height of riser shall be range between 0.5 to 0.66 feet.

## What is a comfortable step height?

In the United States, the step height standard should be **between 7 or 7 ¾ inches at the most, and no less than 4 inches**. You should follow other measurements if given by local building codes. In Canada, the maximum step riser height is 8 ¼ inches.

## What is the minimum depth of a step?

A step tread is the flat, horizontal surface that you walk on. The tread depth is the distance from the front edge, or nosing (a tread projection that overhangs the riser below), of one step to the front edge or nose of the next step, measured horizontally. This distance must be at least **10 inches**.

## What is the minimum width of a staircase?

When it comes to staircase width, there are no restrictions as such, but standard flights measure 860mm, and for a main staircase it is agreed that a width of between 800mm and 900mm works best. A minimum staircase width of **600mm is recommended for secondary staircases**.