Christian McArdle wrote:
The herringboning is to stop the joists twisting, as long spans will
tend to do so. Noggings are generally applied to stiffen floors and
support overlapping boards.

Properly installed herringbone stutting will also stiffen the floor. It is
effectively a solid nogging, with all the redundant wood removed, and only
the actually stressed bits remaining.


Not quite, as others have pointed out, joist shrinkage or strut
shrinkage is more easily accommodated than with a solid noggin -
assuming the things are screwed down tightly.

Obviously, supporting boards is another matter!

Christian.