I am considering ordering a custom-made U-shaped staircase. How do you assemble such a kit?
Do you build it on the floor and raise it in one piece or take it piece by piece?
the stair installers I have seen attach the outer stringers first, then the treads with posts underneath. The inner stringers are screwed on last, followed by the railing, etc. Looked smooth with the right accessories.
Is it a traditionally constructed staircase with steps dovetailed into the stringer. Then you use angled screws under the steps where you can't reach them otherwise.
Yes... or actually, all steps should be attached in that way if it's traditional, but few do so nowadays.