Edit: Retrofit in a timberframe.
There is a tight headroom constraight directly over the beam. Stairs cannot move left.
The area is not living space - storage and possibly a pingpong table
The lowest 'tread' is the floor height to the left.
All risers are 6 1/2" and treads 10 1/8"
Love the discussion - I think it's going back to the engineer!
I’ve been scratching my head at this for a while. Cobbling together various codes and inspection publications haven’t cleared it up either.
can any experts clarify? ideally, i‘d want the full heel of the stringer to be bearing on the hanger and beam. But the beam isn’t tall enough.
directly above the beam is a hard constraint (headroom) so I can’t bring the stairs closer to the beam.
is the solution to fasten a plywood board and/or a 2x12 to the beam and hang fasteners from that? Or am I overthinking everything?
last photo is the (unhelpful) engineer callout, but the lumber dimensions, beam design (and PT) is different in reality.