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.
Stair tread nosing depth.
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.
1 5 38 mm max.
The ontario building code treads and risers 3 4 6 8.
4 100 mm min.
For wood stairs use 4 wood screws.
So since the minimum tread size is 10 a nosing will extend the tread depth to between 10 3 4 and 11 1 4.
For concrete stairs use concrete anchors with 4 screws.
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.
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 surewood lnl 13 in.
For stair treads less than 9 inches deep secure a new deeper tread directly on top of the existing tread.
Styles a and b are for use on wood or concrete stairs.
A nosing is not required where the tread depth is a minimum of 11 inches 279 mm.
Staircase tread run depth.
It is sold unfinished allowing you to finish it to match other red oak stair parts or decor.
The stair riser must measure 8 to 8 1 4 inches high.
11 280 mm min.
A step tread is the flat horizontal surface that you walk on.
10 to 11 inches minimum.
5 13 mm max.
Stair tread depths shall be 11 inches 279 mm minimum.
The stair tread depth red arrow is measured from the forward edge of the step nose or edge of the step above out to the leading edge of the step being measured.
Stair tread nosing stair tread nosing projection past vertical riser below 3 4 to 1 1 2 required on stairs with solid risers.
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.
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.
Stair tread nose curve radius 9 16 or 1 2 in some codes.
2 steps for stairs referred to in sentence 1 shall have a rise between successive treads not less than 125 mm and not more.
Beveling of nosings shall not exceed 1 2 inch 12 7 mm.
Construction adhesive sold separately is for use between nosing and the front edge of the stair to prevent cracks.
Unfinished red oak tread the surewood lnl 13 in.
