Average Stair Length

Standard Stair Dimensions Standard straight-run stairs have dimensions of a stair width of 36 inches or 91.4 centimeters, a stair tread depth of 11 inches or 28 centimeters, a stair riser size of 7 inches or 18 centimeters, and a length from the bottom to the top of the stairs of 10 feet or 3 meters.

What is the average width and length of stairs?

To comply with the Regulations, the minimum going should be 220mm, whilst the pitch of the staircase should not exceed 42°. 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.

What is the 18 rule for a staircase?

Rule one says that rise plus run (r+R) should equal 18 inches. Why? That's what most people find to be a comfortable stride on most stairs. You can cheat a bit up or down, but below 17” and more than 19” will result in steps that require strides either too big or too small for most people.

How many steps is a 10 foot rise?

Hence there are 17 stairs or steps or riser for 10 feet height of staircase. Mathematical calculation such as 1) no. of riser or steps or stairs in 10 feet height of staircase or ceiling = 10 ×12÷ 7 = 17.14, rounding it near to 17, 2) no.

What is a good width for stairs?

In general public spaces a minimum of 44” (112 cm) must be met—providing ample space for one person and allowing the tight passage of two people. Comfortable two person stair widths range between 49” (125 cm) to 60” (152 cm). For three simultaneous users, a minimum of 74” (188 cm) is recommended.

What is the standard depth of a step?

Staircase Tread (Run) Depth: 10 to 11 Inches, Minimum 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.

How wide is a standard step?

Stair treads can be as narrow as 22.5 inches or as wide as 36 inches. Wider stair treads are typically used outdoors while narrower designs between 22.5 inches and 30 inches are more commonly used indoors.

What is the average rise and run of stairs?

The general rule (in the US) is 7-11 (a 7 inch rise and 11 inch run) (17.78cm-27.94cm). More exactly, no more than 7 3/4 inches (19.7cm) for the riser (vertical) and a minimum of 10 inches (25.4cm) for the tread (horizontal or step).

What is a comfortable rise and run for stairs?

Over the years, carpenters have determined that tread width times riser height should equal somewhere between 72 to 75 inches. On a main stair, the maximum rise should be no more than 8 1/4 inches and the minimum run should be no less than 9 inches.

Is an 8 inch step too high?

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.

How steep is the average residential staircase?

The standard angle of a staircase depends on the use case and application for the stair. For most standard stairs, the stair angle varies between 30 degrees and 45 degrees. Egress stairs have a shallower angle around 30-35 degrees while industrial stairs have steeper angles ranging from 40 to 70 degrees.

How long can stairs be without a landing?

The 2021 IRC, R311. 7.3, states that a flight of stairs shall not have a vertical rise greater than 12 feet 7 inches (3835 mm or 151 inches) between floor levels or landings. The code also states that there are exceptions to this vertical height limit.

How many stairs do you need to go up 8 feet?

Stair Rise for 8-Foot Ceilings An 8-foot ceiling will need 14 treads. Divide 96-inches (8-feet) by 7-inches to get 13.71 treads, and round up to 14. In this case, you would not round down as you would have one step that is too tall.

How long is 9 foot ceiling stairs?

Length of staircase for a 9 foot ceiling:- in most homes or residential building, length of staircase or the total length of a flight of stairs for an 9-foot ceiling is approximately 10 feet long.

Which stairs take up the least space?

The types of stairs that take up the least space are ship stairs, spiral stairs, and alternating tread stairs. These stairs all feature compact designs for tight spaces.

What is the minimum width of a stairway?

The minimum recommended stair width is between 34" and 36" Across the width of the tread. Some codes such as CA/OSHA specify a minimum stairway width of 24" [35].. The minimum recommended stair landing length is 36" (or a length and width sufficiently greater than the swing of the door if a wider door is present.

How tall is an average stair step?

With regard to the standard height of a staircase riser, the measurement is often between 6-1/4 and 7-7/8 inches. With respect to the step run, this measurement is between 8-1/4 and 12-1/2 inches.

What is the maximum height for a step?

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 height should a step be?

As a general rule, the riser should be no more than 15 centimetres high (5.9 inches), with the tread at least 30 centimetres (11.81 inches) deep.

What is a comfortable stair angle?

Stair codes and guidelines prefer an angle of around 37° for normal stairways (the green area in our illustration) and around 7° for ramps (the yellow area in our illustration).