If the stair treads are set into grooves routed into the stringer in a 2x stringer the groove depth should be 1 2 the thickness of the stringer typically 3 4 and additional support by cleats or by gluing and end screwing through the stringer sides into the treads is good practice.
Stair stringer thickness.
We shall take you through the example calculations for first a standard mount and then a flush mount set of stairs.
Riser thickness of 1 inch.
You will need to remove the thickness of the riser board from the top stair and remove the thickness of the tread board from the bottom stair.
The stringer mount type refers to how the stringer will be attached to the upper landing or deck frame.
Is the top step really the top step do we need to account for any riser thickness.
You can now draw the notches for the stairs onto your 2x12 stair stringers.
Since the tread depth b is a constant when using the automatic stair calculator the total run g will vary when you toggle between the two mount options.
Once the stair results have been calculated you can toggle between the standard and flush options to compare the differences.
The difference between the stair rises and tread depths cannot vary by more than 3 8 from the largest to the smallest.
Stairs the dreaded stair stringer.
In addition we will show you how the stair stringer calculator works out the rise run angle.
These are available in 2 4 3 6 and 4 2m lengths direct from our online shop.
And a stringer width of 12 inches.
We strongly recommend using stair stringers of a minimum width of 32mm as anything less can result in squeaky treads in your staircase.