Goedjn wrote:


I can't envision precisely what you're situation looks like from the
description but...the thing I think you'll need to be careful about will
be the reaction force on the other end of the joist which will now be in
uplift (probably w/ quite a long moment arm) owing to now having a
cantilevered load...

That shouldn't a problem for stairs. If the thrust at the
top is perpendicular to the joist then the regular blocking
between joists and the plywood subfloor are pretty good at
transmitting/resisting that load.

IF is the operative word here...