The volume bounded by the sides and back closet
walls and planes extending from the closet floor vertically to a height
of 1 800 mm or to the highest clothes-hanging rod and parallel to the
walls at a horizontal distance of 600 mm from the sides and back of the
closet walls, respectively, and continuing vertically to the closet ceiling
parallel to the walls at a horizontal distance of 300 mm or the width of
the shelf, whichever is greater; for a closet that permits access to both
sides of a hanging rod, this space includes the volume below the
highest rod extending 300 mm on either side of the rod on a plane
horizontal to the floor extending the entire length of the rod