The general rule (in the US) is 7-11 (a

**7 inch**rise and 11 inch run). More exactly, no more than**7 3/4 inches**for the riser (vertical) and a minimum of**10 inches**for the tread (horizontal or step). You can find some more information here as well on other stair-related dimensions.How many steps do I need on my deck?

To determine

**the**rise and run of**the steps**, measure**the**distance from**the**floor of**the deck**to**the**ground and divide that number by 7.5.**The**result will be**the**number of**steps the**staircase will need (e.g.,**deck**is 112" from**the**ground; 112/7.5 = 14.93. Round up to get 15**steps**).1

## What is the minimum height of a step?

All steps on a flight of stairs shall have uniform riser heights and uniform tread depth. Risers shall be

**4 inches**(100 mm) high minimum and**7 inches**(180 mm) maximum. Treads shall be**11 inches**(**280 mm**) deep minimum, measured from riser to riser.2

## How high is a concrete step?

The 7-11 rule is one that's frequently used (maximum riser height of

**7 inches**and minimum tread depth of**11 inches**). Risers should also be at least**4 inches**in height.3

## How far can a stair go without a landing?

A flight of stairs shall not have a vertical rise greater than

**12 feet**(**3658 mm**) between floor levels or landings. The width of each landing shall not be less than the stairway served. Every landing shall have a minimum dimension of**36 inches**(**914 mm**) measured in the direction of travel.4

## How far apart do stair stringers have to be?

Cut stringers can be spaced no more than

**18 inches**on center, so a 3-foot-wide staircase needs three stringers, and a set of slightly wider stairs (say**3 feet 6 inches**) needs four stringers. The maximum 18-inch spacing presumes treads of**5/4**-inch wood decking or 2-by stock.5

## What is the most comfortable angle for stairs?

The angle is based on the amount of space available, but is commonly determined by the rise and run of a stair. With a 7 inch riser and an 11 inch tread (this is usually a minimum) you get an angle of arctan(7/11) or

**32 degrees**.6

## What is the maximum tread depth of a step?

Stair riser heights shall be

**7 inches**(**178 mm**) maximum and**4 inches**(**102 mm**) minimum. Stair tread depths shall be**11 inches**(**279 mm**) minimum. The riser height shall be measured vertically between the leading edges of adjacent treads.7

## How do you calculate steps?

Use a calculator to

**calculate**the**stair**riser length or the number of steps you'll need. Divide the height from the first floor to the top of the second floor by a predetermined height of your choice for the riser. The typical height of a riser is 6 or 7 inches (15 to 17.5 cm).8

## How many steps are in one flight of stairs?

Generally a flight of stairs has

**12**or 13 steps. The maximum in a single flight is 16 before you require a landing. In a non domestic building where a storey height may be 3.4m to 4m, you need two flights per storey. A riser (the height of a step) is generally 170mm to 220mm, with an average of 190mm.9

## How long is a person's step?

A man's average step length is

**approximately 31 inches**and his average stride length is 62 inches. For walking programs, women are encouraged to use an average step length of 26 inches and men are encouraged to use an average step length of**30 inches**.10

## How wide do stairs need to be?

**Stair**Width: 36 Inches Minimum (Not Including Handrails) Translated: This means that any

**stairs**must be at least 3 feet

**wide**, measured from side to side as if you are walking up or down the

**stairs**.

11

## What are the parts of a step?

Each

**step**is composed of tread and riser. The part of the stairway that is stepped on. It is constructed to the same specifications (thickness) as any other flooring. The tread "depth" is measured from the outer edge of the**step**to the vertical "riser" between**steps**.12

## How thick does a stair tread need to be?

As you may have noted from the sketches and text above, typically building codes for stairs specify minimum stair tread thickness (1" if supported by a riser at front, or

**1 1/2"**thick treads if the stairs are open-construction without risers), but they do not specify a maximum allowable tread thickness.13

## How wide do stairs need to be on a deck?

- The

**stair's**treads**should**be at least 36 inches**wide**. We think**stairs should**be at least 48 inches**wide**, so they don't feel cramped. - The maximum allowable**stair**rise is 7 3/4 inches, and the minimum**stair**rise is 4 inches.14

## What is code for stair treads?

Stair riser heights shall be

**7 inches**(**178 mm**) maximum and**4 inches**(**102 mm**) minimum. Stair tread depths shall be**11 inches**(**279 mm**) minimum. The riser height shall be measured vertically between the leading edges of adjacent treads.15

## How many feet do you need for a staircase?

It will yield a staircase with

**14**risers. All staircases have one more riser than they do treads. This means you will have 13 treads for a total length of**130**inches or**10 feet**10 inches. You must also figure in a minimum**three**-foot landing or clear floor area at the bottom of the steps.16

## How many stair steps before a landing is required?

Length of flight. Stairs with more than

**36 risers**in consecutive flights should have at least one change in direction between flights. For buildings other than dwellings, the maximum number of risers between landings should be 16 for utility stairs and**12**for general access stairs. There should not be any single steps.17

## How high is a flight of stairs?

"Though codes vary, a good rule of thumb is that stairs must not be continuous for more than 12 vertical feet. At

**12 feet**, a landing must be introduced. With typical riser heights of 7"3/4 you typically see 16-18 "steps" in a flight of stairs.18

## How many vertical feet is a flight of stairs?

Flights Measured by Feet. Stair stepper machines typically calculate a flight by the distance traveled, with one flight equaling 10 to

**12 vertical feet**. One exercise equipment brand calculates a floor to be about**10 vertical feet**, which is approximately equal to running 100 feet on level land.19

## How do you measure for stairs?

**Measure**out that distance from the deck to find the exact landing point. From this point, you can

**measure**the exact

**stair**height and determine the stringer and skirt length.

**Measure**the exact total rise (Photo 1). Divide the height (X) by your estimated number of risers to find the exact riser height.

20

## How wide is the average door?

Standard entry door measurements: Height: 80 inches (6 feet, 8 inches) Thickness: 1 ¾ inches. Width: 36 inches standard; 30 and

**32 inches**also available.