The steps are 18" wide and project 4"
It would be from the wall to the face of the well.
The 50" is the inside dimension.
Yes, the inside dimension is indicated. The 36" projection would be from the wall to the front of the well.
Yes, this well is able to accommodate a 48" wide window.
What is soul? Backfill with gravel then good quality soil, and connect a yard drain on the inside to the footer drain tile.
We do not have a 42" projection of the Block-Tex