## How wide should a public staircase be?

Commercial Stairs Built for the General Public According to the IBC, stairways with an occupant load of fewer than 50 people must be at least 36 inches wide. Stairs that are higher than 12 feet tall require an intermediate landing in the middle of the stairway.

## What is the minimum width of a commercial staircase?

It must be at least 36 inches wide if the occupancy of the building will be 49 people or less. Disabled-accessible stairways are more complicated. There is a 48-inch minimum width requirement – unless there are automatic sprinklers installed, then the minimum width is 44 inches.

## How wide are typical stairs?

Stair width. Building regulations state that the width of your individual stairs should be at least 3 feet or wider. The entire width of your staircase needs to reach a minimum of 36 inches wide. This measurement refers to the distance between both sides of the staircase and does not include the handrails.

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## What is the maximum width of stairs?

(1) Stairways serving an occupant load of more than 50 shall be not less in width than 44 inches. Stairways serving an occupant load of 50 or less may be 36 inches wide. Private stairways serving an occupant load of less than 10 may be 30 inches wide.

## Is there a minimum width for a staircase?

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 building regulations for stairs?

The following rules must be met: The individual rise must be between 150mm and 220mm. The individual going must be between 220mm and 300mm. The Pitch of the stair cannot be greater than 42 degrees.

## How many stairs do you need before a landing?

– A landing is required every 12′ of vertical stairway rise. – The landing should be at least as wide as the stairway that it serves. How wide does my stairway need to be?

## How wide do fire stairs have to be?

The minimum width of an exit access shall be 36 inches for new buildings and 28 inches for existing. These minimums may be increased by individual occupancy chapter requirements. Stairs must be of sufficient width so two persons can descend side by side to maintain a reasonable rate of evacuation.

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## What is the space under the stairs called?

Spandrel. If there is not another flight of stairs immediately underneath, the triangular space underneath the stairs is called a “spandrel”. It is frequently used as a closet.

## What is a comfortable stair rise?

A standard number of treads in a stair between first and second floors is 14. With a riser height of 7 1/2 inches, tread width (run) should be at least 9 inches. Ten inches is a more comfortable run; when you multiply 7 1/2 inches by 10 inches, you get 75 — within the conventional ratio of 72 to 75 inches.

## How many stringers do I need for a 36 inch wide staircase?

If you have a stairway that’s 48 inches wide and you divide 16 inches into 48 inches, you will find that you need four stair stringers. If you’re stairway is between 30 and 36 inches you will need three stair stringers.

## Do I need a handrail for 3 steps?

If your home has three or fewer steps, there’s no need to install a handrail. However, homes having four or more stairs must have a rail mounted on at least one side if the stairway is less than 44 inches wide. If one edge of the stairwell is open, that’s where the handrail must be.

## Is code recommends that the slope of stairs should be between?

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). Steeper slopes or angles are permitted for stepladders in certain applications as you can see in the illustration.

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## How thick should stair risers be?

According to general specifications, your stair riser thickness should be no less than ½”. In fact, many professionals recommend risers with a thickness of ¾”. It’s also important to note that if you do build a closed riser staircase, your stair treads will need to have a note as well.