Riser – A stair riser is the vertical space between one step and another. It may be closed or open, depending on the style of the stairs. Tread – A stair tread is the horizontal part of the step that a person will stand on, and along with the riser, is an integral part of a staircase.

What is the height of riser in a stair?

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.

Where are the risers on stairs?

Looking at a flight of stairs, the riser is the vertical piece that appears to connect the horizontal treads of each step. While walking up a flight of stairs, a person’s toes point at the stair risers. A stair riser is located at the front edge of each step.

What is riser and step?

STEP: It is a portion of the stair that provides upward or downloads movement. A stair is composed of a set of steps. TREAD: It is a top portion or surface of step on which foot of ascender or descender comes when going up or download by stair. RISER: It is a vertical portion of a step providing support to the tread.

How do you calculate stair risers?

To determine the number of risers in the staircase take the total height between floors, in inches, and divide by 8.25.

Is a 10 inch step too high?

Building codes in many areas define maximum step height and minimum tread width, but in areas where it is not defined, Council of American Building Officials and International Code Council both recommend the rise to be no more than 7.75 inches and runs to be no less than 10 inches.

Does the riser go behind the tread?

All your risers will sit behind the tread, with the tread flush against the face of the riser behind it. This allows you to screw through the subfloor from behind into the riser and tread, making a solid bond between both riser and tread. Installation of the riser first allows you to level the tread properly.

What is the difference between riser and rise?

What Are Stair Risers? Every set of stairs also has risers for each step. The stair risers are the vertical pieces on the stairs. The height of each step is called the rise.

What are the different parts of stairs called?

Most people are aware of some stair parts names such as the tread, riser, landing and handrail. But unless you are an architect or builder, you may not be familiar with staircase terminology such as baluster, stringer, volute, bullnose or newel post.

What is the normal rise and run for stairs?

What is code for rise and run of stairs? The 2018 IBC building code for rise and run of stairs is a maximum 7″ rise and minimum 11″ run (tread depth). The OSHA standard for rise and run of stairs is maximum 9.5″ rise and minimum 9.5″ run (tread depth). The IBC maximum rise of a single stair flight is 12.

How do you measure treads and risers?

Quote from video: Total required number of tread is equals to total stair tread or run divided by width of 1 tread.

How do you calculate step heights?

Divide the overall change in level (overall rise) by 150mm.

  1. 450mm / 150mm = 3. This tells us that with a riser of 150mm we will need 3 risers/steps. …
  2. 450mm / 2 = 225mm. …
  3. Twice the Rise plus the Going (2R + G) should be between 550mm and 700mm. …
  4. 2 x 150mm + 275mm = 575mm.

How do you measure the height of a riser?

Take the total rise measurement (104 inches) and divide by the number of risers (13).

  1. 104 / 13 = 8. Stairs are cut to the nearest 1/16”. In this particular example the riser height is exact. If it. …
  2. 12 * 9 =108” You must now add 2.25” or 1.75” for nosing and riser thickness. Most stairs will be 2.25”.

What is the standard size of staircase?

The stair’s width usually varies depending on the type of building the staircase is in, but for a normal residence, the standard tends to be 3 feet, 6 inches (106.7 cm). The minimum, in most places, is 2 feet 8 inches (81.3 cm). If a staircase exceeds 44 inches (111.8 cm), handrails are required for both sides.

Are stairs 45 degrees?

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.

What is the most comfortable angle for stairs?

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.

What is the formula for calculating stairs?

You divide the height by 7 inches; if, say, the floor-to-floor distance is 8 feet, 10 inches (or 106 inches), then you’ll need 15 treads (106 divided by 7 equals 15.14). Next, you divide the height by the number of treads (15 into 106), producing the exact tread height (7.06 inches).

What is the maximum pitch for a staircase?


The maximum pitch for a domestic building should not exceed 42° and for a public building, it should not exceed 33°.

What is the standard slope for stairs?

The sum of one rise and run should equal 17″ – 18″ The sum of two risers and one run should equal 24″ – 25″ One rise times run should equal 70″ – 75″ The acceptable slope is between 20 and 50 degrees, with the preferred slope being between 30 and 35 degrees.

What are the requirements of a good stair?

Following are the General Requirements of a Good Stair:

  • Location of Staircase: Staircase should be located such that it can be easily accessible from different rooms of the building. …
  • Width of Stair: …
  • Length of Flight: …
  • Pitch of Stair: …
  • Head Room: …
  • Balustrade & Railings: …
  • The Dimensions of Stair: …
  • Winders:

What is Scotia in staircase?

Scotia Moulding – The timber moulding that sits around a cut string staircase. Soffit – The visible sloping under-surface between stair strings. Spindles – Turned, carved or otherwise vertical sections placed between the handrail and the stair tread or string. Also known as balusters. Shop for spindles.

What is the space between stairs called?

Riser – A stair riser is the vertical space between one step and another. It may be closed or open, depending on the style of the stairs.

What is soffit in staircase?

Explanation: The soffit is the underside of stair. Important Points.

What is the top of a staircase called?


The landing of a staircase is either a platform where the direction of the staircase changes or is located at the top of a staircase. The outer string is the side of a staircase where the treads and risers can be seen from the side. A riser is a vertical board that forms the face of a step.

What is the meaning of newel?

Definition of newel

1 : an upright post about which the steps of a circular staircase wind. 2 : a post at the foot of a straight stairway or one at a landing.

What is newel in staircase?

newel, also called Newel-post, upright post rising at the foot of a stairway, at its landings, or at its top. These posts usually serve as anchors for handrails. Often the stringboards, which cover and connect the ends of the steps, are framed into the newels.