With stairs utter rigidity is the way to go. Either chase into the brick
and mount on a concrete pad AND use a hangar to avoid it being pulled
out, or use a post from below tied to the floor, and screw that soundly
to the wall as well.


I have a hanger for connecting the other end to the joist.



What sort of depth should I chase into? I was thinking about 100mm. I
thought that would give more stability abd rigidity.

Thanks

Chris