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.
Stair riser and tread size.
These dimensions may be useful when laying out a staircase or if you have general questions about the size and shape of a traditional tread or a retro tread.
Not all steps have a nosing but when.
It will fit stairs up to 48 in.
From stair treads stair railing and a complete selection of stair parts surewood lnl has what you need to make your stairs beautiful.
Inconsistencies or variations in risers or treads could interfere with the rhythm of the individual using the stairs.
Open riser stair treads must be at least 1 1 2 thick because the tread not supported by a riser may otherwise split.
The tread depth td is to be 185mm and it should not be more than 30mm shorter than the going g.
Take a look at the sketch of stair specifications.
It has a 1 in.
A uniform flight of stairs provides a safety factor.
This is the surface that the user steps on.
In width and accommodates tread runs up to 11 1 2 in.
Open riser stairs are allowed a back slope of at most 1 1 2.
For convenience and flexibility this stair stringer calculator comes in two forms the automatic and manual click on the icons to determine the best calculator to use for your stairs.
All risers and all goings in the same flight of stairs shall be of uniform dimensions within a tolerance of 5 mm.
It is also the approach space at the top and bottom of the stairs.
Stair details refer to the standard requirements for each of the various components of a flight of stairs.
Stair riser heights and stair tread depths should be within the parameters of the code to avoid any potential trip hazards for inconsistencies.
The section of the tread that overhangs the riser below.
Open riser stair treads should be to 9 1 4 in depth and will typically be greater at shorter stair riser heights.
Thickness and is sold unfinished allowing you to finish it to match other stair parts or decor.
Building codes generally suggest that the maximum height of a riser be 7 75 inches 19 7 cm nosing.
The number of risers not the number of treads is used to determine the number of steps that comprise a staircase.
The tread is the horizontal section of each stair sometimes called the run.
Standard stair tread dimensions.
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.
The nosing is the protrusion at the edge of a tread that hangs over the riser below.
Here is a drawing detailing our standard stair tread and riser dimensions.