| 摘要 |
PURPOSE:To restrict passages of dwellers through stairs or elevator to certain specified floors solely. CONSTITUTION:Stairs 13 for going up to the sixth floor from the left side of the fourth floor are installed on this side, while stairs 14 for going down to the second floor (shown by broken lines) are provided back more than the stains 13 with a bulkhead 15 interposed. Stains 16 for going down to the second floor from the right side are installed on this side while stairs 17 for going up to the sixth floor (shown by broken lines) are provided back more than the stairs 16 with bulkhead 15 interposed. When any dweller on the fourth floor is going up to the sixth floor, he uses the stairs 13 and 17 and he is no chance to meet any fifth floor dwellers because the stairs 13 and 17 are not leading to the fifth floor. To go down to the second floor, he uses the stairs 14 and 16 and he is no case of meeting any third floor dwellers because the stairs 13 and 17 are not leading to the third floor. |
