THIS PAPER DIVIDES THE CHANGES IN INDUSTRIAL FLOOR INTO TWO PARTS: THE CHANGES WHICH OCCUR IN THE VERTICAL DIRECTION AND IN THE HORIZONTAL DIRECTION. A CLOSE INVESTIGATION OF THE RELATIONSHIP BETWEEN THE VERTICAL AND HORIZONTAL FLOOR CHANGES SHOWED THAT THESE TWO CHANGES INDEPENDENTLY TOOK PLACE IN MOST AREAS. THE PAPER THEN CALCULATES A RELATIVE INDICATOR EXPRESSING THE EXTENT OF THE VERTICAL FLOOR CHANGE FOR EACH OF THE EIGHT USE ZONES, AND DISCUSSES THE RESULT WITH THE EFFECTS OF THE USE ZONE SYSTEM.
