Nearly one thousand of indoor escape stairs of medical and welfare facilities were collected to measure the size of staircase and landings. The findings of this survey are as follows. 1. Very few staircases satisfy the required size for area of rescue assistance in ADA. 2. More than seventy percent of staircases are arranged to adjust the typical span of wards. 3. Area of rescue assistance requires additional space in landing, which will consequently raise the total floor area. Easing restrictions of floor area ratio will be effective to make areas of rescue assistance widespread.
