Stair Treads And Risers Size

The board that encloses the back of the step is also called a riser.
Stair treads and risers size. Having the right calculations before getting started can make the task a lot easier. It has a 1 in. In a given run of stairs the greatest tread depth should not exceed the smallest by more than 3 8 inch 9 5 mm. A uniform flight of stairs provides a safety factor.
Take a look at the sketch of stair specifications. Regulated by building codes stair details specify the sizes of risers and treads stair widths the placement of handrails and guardrails and construction methods for fabricating stairs. Open riser stair treads must be at least 1 1 2 thick because the tread not supported by a riser may otherwise split. 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.
Typically a single 2x12 or two 2x6s are used for stair tread material. One on each side and. To simplify the process we ve created this deck stair calculator to help you determine the correct measurements needed to carry out your project. The tread is the horizontal section of each stair sometimes called the run.
A riser is the vertical measurement of each stair. This is the surface that the user steps on. Treads the tread depth b should not be less than 10 inches 254 mm. Risers can either be enclosed or left open as in deck stairs or basement stairs.
Stair riser heights and stair tread depths should be within the parameters of the code to avoid any potential trip hazards for inconsistencies. As part of the tarkett family johnsonite has delivered the broadest portfolio of high performance resilient flooring surfaces in the industry. Open riser stair treads should be to 9 1 4 in depth and will typically be greater at shorter stair riser heights. Similarly handrails must be between 34 and 38 96 52 inches high measured from the top of the treads with a diameter between 1 25 inches 3 18 cm and 2 675 inches 6 79 cm.
Open riser stairs are allowed a back slope of at most 1 1 2. Balanced solutions for productive spaces. Building stairs for your deck is often considered the most difficult part of the construction project. Stair details refer to the standard requirements for each of the various components of a flight of stairs.
A stair stringer is a structural member that supports the treads and risers of a staircase. Harvard university lists typical tread sizes between 8 and 11 1 2 inches. Thickness and is sold unfinished allowing you to finish it to match other stair parts or decor. In width and accommodates tread runs up to 11 1 2 in.
Typically there are three in a staircase. With practical solutions and healthier materials that support every stage of the project from specification to installation to maintenance we re able to deliver measurable return on investment and.