Styles a and b are for use on wood or concrete stairs.
Stair tread nosing depth.
1 5 38 mm max.
7 180 mm max.
Treads and risers 1 except as permitted for dwelling unitsand by sentence 3 4 7 5 1 for fire escapes steps for stairs shall have a run of not less than 255 mm and not more than 355 mm between successive steps.
For wood stairs use 4 wood screws.
The stair tread depth shall be measured horizontally between the vertical planes of the foremost projection of adjacent treads and at right angle to the tread s leading edge.
The ontario building code treads and risers 3 4 6 8.
Screw nosing into place to protect the front portion of the stair and provide a slip resistant surface.
So since the minimum tread size is 10 a nosing will extend the tread depth to between 10 3 4 and 11 1 4.
2 steps for stairs referred to in sentence 1 shall have a rise between successive treads not less than 125 mm and not more.
Unfinished red oak tread the surewood lnl 13 in.
10 to 11 inches minimum.
For a typical staircase the stair tread must measure 8 1 4 inches to 9 inches deep measure 1 inch thick or more and have a maximum 1 1 2 inch deep nosing.
The greatest stair tread nosing projection shall not exceed the smallest nosing projection by more than 3 8 inch 9 5 mm between two stories including the nosing at the level of floors and landings.
Stair tread depths shall be 11 inches 279 mm minimum.
Staircase tread run depth.
5 13 mm max.
Construction adhesive sold separately is for use between nosing and the front edge of the stair to prevent cracks.
The stair riser must measure 8 to 8 1 4 inches high.
Stair tread nosing stair tread nosing projection past vertical riser below 3 4 to 1 1 2 required on stairs with solid risers.
A step tread is the flat horizontal surface that you walk on.
A nosing is not required where the tread depth is a minimum of 11 inches 279 mm.
Attaches to the ends of plain treads to create a return tread in open stringer stair designs.
Unfinished red oak tread nosed return is made for interior stair construction from attractive natural oak.
4 100 mm min.
It is sold unfinished allowing you to finish it to match other red oak stair parts or decor.
Stair tread nose curve radius 9 16 or 1 2 in some codes.
11 280 mm min.
For concrete stairs use concrete anchors with 4 screws.
The surewood lnl 13 in.
The tread depth is the distance from the front edge or nosing a tread projection that overhangs the riser below of one step to the front edge or nose of the next step measured horizontally.
For stair treads less than 9 inches deep secure a new deeper tread directly on top of the existing tread.
