Hi all.
Going to replace my stairs.
Mine are bog standard 13 treads and risers in an old terraced house.
I fancy the cut stringer style but I should think the stringer would
need
be thicker than for the closed style stringer.

Anyone know the 'rule' on this?

Thanks.

Arthur

There's no particular rule of thumb for sizing stair stringers/
carriages/housings that I'm aware of. However you presumably have a
current housed stair to use for comparison purposes - so sizing the
narrowest part of a cut-carriage to equal the depth of the housing
should work. Otherwise you could use the floor joist tables from the
Building Regs to give you a ballpark figure for narrowest point on a
cut-carriage.

Are you planning open risers and is that your motivation for changing
the design? Be aware Building Regulations has quite a bit to say on
stair design.

I'd recommend either one of the general joinery textbooks that cover
stairs (e.g. Porter & Rose) or "Basic Stairbuilding" - Scott Schuttner

http://www.amazon.co.uk/Carpentry-Jo...3562894&sr=1-1

http://www.amazon.co.uk/Carpentry-Jo...3562894&sr=1-2

http://www.amazon.co.uk/Basic-Stairb...3562969&sr=1-3