Nosings must project at least 3 4 inch and no more than 1 1 4 inches beyond the riser below.
Thickness of stair tread.
Riser and tread dimensions should be continuously uniform for safety.
The actual thickness of the stair tread.
The greatest tread depth within a flight of stairs cannot be more than 3 8 inch larger than the smallest tread depth.
Full thickness of 11 16 across entire tread may not be available in some wood species.
Here is a drawing detailing our standard stair tread and riser dimensions.
Standard stair tread dimensions.
Since wood stairs are the most popular material used in homes today here are three wooden stair tread specifications for your personal reference.
In my opinion a tread that is too thick might also have a tread nose that is too thick and might be a trip hazard to people ascending the stair.
Building codes limit variation to 3 8 10 mm the underside of risers should be sloped or have a 60 angle minimum between nosings and the horizontal surface open risers are not allowed under ada guidelines.
The old stair treads are just garden variety pine 1 5 thick cut from 2x10.
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.
Stair tread thickness as long as the span between stringers isn t too great 3 4 is fine kinda cheap unless it s finished oak i like 4x12 timber treads.
According to the ibc stair tread depths must be a minimum of 11 inches on rectangular stairs.
Tread face thickness with full 11 16 bull nose at front a c pie shaped stair tread d b.
If the stair treads are.
I would like to build the new staircase using white oak treads would 3 4 or 7 8 thick treads in white oak with two stringers be sufficient.
The tread depth can go to any maximum as long as the maximum tread in a stairway does not exceed the smallest by over 0 375 inches.
The strength of your stair treads needs to have a thickness that can effectively support a person going up and down the.