# Standard size of stairs for residential and commercial building

The staircase is an essential component of residential or commercial buildings. the staircase gives us convenience in going from one floor to another. Generally, residential or commercial houses are made of concrete stairs. Stairs can be of many shapes like U shape, L shape, etc. In such a situation, we should know what is the standard size of stairs for residential and commercial buildings.

The stairs are made in a very elaborate way. Stairs can be made from one floor to another floor, or by changing direction. Generally, in multi-story buildings, stairs are made by changing direction at an angle of 180 degrees.

## What is Stair/ staircase?

The staircase is that component of any building, which connects one floor to another and it is the only way to go from one floor to another. Stairs can be of many types like curved, straight, U shape, etc. and the type of stairs depends on the size of the space which is identified for the stairs and the size or type of buildings.

There are many parts of the stairs, which are as follows, we will discuss some important parts here.

• Riser
• landing
• Step
• Nosing
• Flight

What is riser:

The height between one tread to another tread is called a riser. The standard size of the riser should be between 6 to 8 inches. The height of the riser is determined by precalculation of the height of the roof from the surface. But in any case, the height of the riser should be between 6 to 8 inches only.

When we go from one floor to another, we use stairs. While climbing the stairs, the part of the stairs on which we keep our feet is called tread.

### What is Landing:

When a staircase goes from one floor to another, there is a flat landing which is often found in spiral staircases. That resting place is called landing. In straight stairs, this landing does not happen in the middle, in straight stairs, the floor itself acts as a landing.

Step:

The riser which is the horizontal part of the step and the tread is the vertical part of the step. 1 riser and 1 tread make 1 step.

Noising:

The part of the tread that extends below the riser is called the nosing. Noising gives a little extra room to walk.

Flight:

A series of stairs is called a flight, but a landing should not come between a series of stairs. The series of stairs between the surface to the landing will be called a flight, and the series of stairs from the landing to the second floor will also be called a flight.

### Standard Size of stairs

There are many different parts in the stairs, in which some standard size is fixed but some are determined according to the size of the building. The length of the tread depends on the size of the building or how much space has been reserved for the stairs in the building. Yes, standard sizes are already defined for some parts like the riser, tread width, etc.

I am telling you the best standard size for the stairs of residential buildings based on my experience. The best standard size of tread for any building should be 3.5 feet. And the length of the tread should be at least 10 inches, and you can keep it as per your requirement. The size of the riser should be 6 to 8 inches.

### Standard Stairs Riser height

The height of the stairs is called the riser, and the height of the riser should be only 6 to 8 inches. Due to the high height riser, the elderly and children face a lot of difficulty in climbing the stairs.

### Standard Stairs tread size

Tread is that horizontal part of the stairs, on which we climb the stairs. The standard size of tread should be 10 inches without nosing for residential buildings. Except for residential buildings, the size of tread in commercial or other types of buildings can be 10 to 12 inches excluding nosing.

### Standard Stair Step size

The combination of riser and tread is called steps, and the step size in residential buildings must be at least 3 to 3.5 feet long and 10 inches wide. In commercial buildings, this size can be changed according to the need.

### The standard size of Stairs according to United states standard

According to US standards, the width of the stair should be at least 36″ (3 feet) and the riser height should be 6 to 8 inches. The tread width should be at least 10 inches according to US standards and tread width is taken by the American people’s foot size.

### The standard size of Stairs according to UK standard

According to UK standards, the width of the stair should be at least 36″ (3 feet) and the riser height should be 6 to 8 inches. The tread width should be at least 10 inches according to UK standards.

### The standard size of Stairs according to UK standard

According to Australian standards, the width of the stair should be at least 36″ (3 feet) and the riser height should be 6 to 8 inches. The tread width should be at least 10 inches according to Australian standards.

#### Conclusion:

Guys in this article we have discussed what is the standard size of stairs. We also discussed the standard size of different parts of stairs like the standard size of the riser, tread, steps, etc.

##### FAQ
What is the standard size of tread and riser for residential buildings

The standard size of the riser for a residential building should be between 6 to 8 inches. The standard size of the tread width is 10 inches. But you can put your tread width at 8 inches, and tread width can be 12 inches for the residential building.

What is the Standard size of stairs for residential building

The standard size of stairs should be width 36″ (3 feet), the riser height 6 to 8 inches, and the tread 10 inches.

Minimum stair riser height residential

The minimum riser height should be at least 6 inches.

Maximum riser height for residential stairs

The maximum riser height can be 8 inches for residential stairs.