Here's good example of a 2 x 14 that we used
our stair stringer pattern, to mark the next stair stringer.
Here's a Simple Stair Building Tip: Make sure that the stair stringer
pattern doesn't move at all, while you're marking the next stringer. If
it does move, simply reposition it and continue marking.
If you're having too many problems with the stair stringer moving, place
something heavy on top of the pattern or grab some type of clamps to
clamp the stringer pattern to the uncut piece of lumber.
Split Level Stair Framing