What is a tread on a stair?

What is a tread on a stair?

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. Newel posts – Newels are the large post found at the foot and at the top of any flight of stairs.

What are stair treads called?

Riser: what is a riser? A riser is the vertical part of the stair between each tread. Stairs with risers are called closed tread stairs.

How do you count stair treads?

1. There are four main components that need to be considered when measuring a staircase: Rise, Run, Width, and Headroom.
2. To determine the number of risers in the staircase take the total height between floors, in inches, and divide by 8.25.
3. In a straight staircase, there will always be one fewer stair tread than riser.

How much should a stair tread overhang?

Nosing Requirements The nosing on treads, believe it or not, has a code minimum and maximum of how far the nosing projects over the next stair. Nosings are required to overhang a minimum of ¾-in. to a maximum of 1-¼-in. Also the maximum nosing radius cannot exceed 9/16 of an inch.

What is the size of a stair tread?

Most stair treads measure between 8 and 10 inches long, with longer treads being used on larger staircases. Nine-inch stair treads are the most common lengths. To determine the length you need, simply measure from the back of the step to the front of the step.

What is the edge of a stair called?

Staircase nosing is a horizontal edge of a step often used where the most foot traffic occurs. These are often used in commercial settings to improve the safety of a staircase. A stair tread is the horizontal part of the set of stairs that the user walks on.

What is a stair riser and stair tread?

Stair treads are the horizontal pieces of the staircase that you step or “tread” onto. Stair risers are the vertical “back” pieces of the steps. Most staircases inside the home have a riser for each step. However, other staircases (such as outdoor deck stairs) have an open back and do not use stair risers.

What is the ideal tread to riser ratio?

The following is a rule-of-thumb formula for interior stairs, as specified in the Architectural Graphic Standards. Riser + Tread = 17.5 inches: 7.5 inches for the riser height; 10 inches for the tread depth.

How do you calculate rise and tread on stairs?

Determining the Rise 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 standard tread width for stairs?

Tread Width The width of the tread from side to side is commonly stated as a minimum of 36 inches for residential construction and 48 inches for ADA compliant public buildings.

How much are the stair tread lips?

The nosing on treads, believe it or not, has a code minimum and maximum of how far the nosing projects over the next stair. Nosings are required to overhang a minimum of ¾-in. to a maximum of 1-¼-in. Also the maximum nosing radius cannot exceed 9/16 of an inch.

What is the average tread depth on stairs?

Harvard University lists typical tread sizes between 8 and 11 1/2 inches. However, the Americans with Disabilities Act (ADA) lists the minimum tread size as 11 inches, which would be the effective minimum and likely the average size of the tread for any stairs built for public use.

What is a stair tread?

A stair tread is the horizontal portion of a set of stairs on which a person walks.

What is the tread and riser ratio for interior stairs?

Interior Stairs Tread and Riser Ratio. The typical interior stair dimension is calculated as the formula, riser (R)+ tread (T) = 17 inches minimum, or 18 inches maximum, not including the nosing. The nosing is the projecting edge of a tread. Risers can be too low and treads too long for comfortable use of the stairs;

What is nosing on a stair tread?

Nosing is the portion of the tread that overhangs the front of the riser. Often a stair builder will talk about the rise and run of the stair. The rise is the vertical dimension from tread to tread, while the run is the horizontal dimension from riser to riser (not including the nosing).

What are the different parts of a staircase?

A staircase has many components from the treads, fascia, stringers and more. Understand some of the terminology related to stairs, railings, and their components. The riser is the vertical surface of the stair. The tread on the other hand is the horizontal surface of the stair and the part of the stair you step on.