Here's a nice picture of the bottom stair
stringer after it's been cut. This stair stringer is going to connect to
the concrete foundation.
2 5/8" have been cut off of the bottom, to allow for the 1 - 1/8"
plywoods stair treads, along with the 2 x 4 treated lumber. Make sure
that you deduct the exact amount necessary, from the bottom of the stair
stringer, so that each individual stair riser will be the exact same
measurement when finished.
Split Level Stair Framing