spiral staircase for loft

AJ/FormS said
I think it's a not a good idea to cantilever 2x4s on lag-bolts out to 50%, or 4 ft. When weight is applied to the front cantilevered part,the rear end is gonna be pulled up; like a see-saw.
The 2x4s would also have to be x-braced to prevent them from flipping over sideways.
Double shear to a vertical member, or a jack-stud underneath it, would work on the center point, but you still need to anchor the rear end to the floor joists. Not the sill-plate and not the adjacent studs, unless they too are anchored to the floor-joists, in shear, not tension.
Well I suppose you could chain the cantilever to the ceiling trusses. Not the collar ties and not the rafters.

i understood about 1/4 of that

now, the reason i revived this thread, is because i just picked up a spiral stair case
it needs a coat of paint and some fresh carpet on the steps, but the bone are good

what i really like about it is the last step is the landing, so thats where it mounts to the landing

now, my biggest issue is once again, extending out the loft about 2 foot
which brings me back to post AJ made

how can i mount this to the wall in a manner that allows it to not fall down?
there is one 8 1/2 foot section it will but up against, and then 2 small walls on the side, which only leaves the "front section" open

now, with the last step of the stairs being the landing that will actually help support it, no ?