日本財団 図書館


407.4 New Limited-Use/Limited-Application Elevators. New accessible limited-use/limited application elevators shall comply with 407.4.1 through 407.4.10 and shall comply with ASME/ANSI A17.1, Part XXV.
 
407.4.1 Automatic Operations. Elevator operation shall be automatic. Each car shall automatically stop at a floor landing within a tolerance of 1/2 inch (13 mm) under rated loading to zero loading conditions.
 
407.4.2 Call Buttons. Call buttons in elevator lobbies and halls shall be located vertically between 35 inches (890 mm) and 48 inches (1220 mm) above the floor, measured to the centerline of the button. Such call buttons shall have visible signals to indicate when each call is registered and when each call is answered. Call buttons shall be 3/4 inch (19 mm) minimum in the smallest dimension, and shall be raised or flush. The button that designates the up direction shall be located above the button that designates the down direction. Objects located beneath hall call buttons shall protrude into the floor area adjacent to the hoistway entrance 4 inches (100 mm) maximum.
 
407.4.3 Hall Signals. A visible and audible signal complying with 407.2.3 shall be provided in the car or at each hoistway entrance to indicate the direction of travel.
 
407.4.4 Tactile Signs on Hoistway Entrances. Tactile character and Braille floor designations shall be provided on both jambs of elevator hoistway entrances and shall be 60 inches (1525 mm) above the floor measured from the baseline of the characters. Such characters shall be 2 inches (51 mm) high and shall comply with 703.2.
 
407.4.5 Doors. Elevator hoistway doors shall be either swinging or horizontally sliding type. Elevator hoistway and car doors shall open and close automatically. Horizontally sliding type hoistway and car doors shall comply with 407.2.5. Swinging hoistway doors shall conform to 404. Swinging doors shall be low energy power-operated and shall comply with ANSI/BHMA A156.1.9 Power operated swing doors shall remain open for 20 seconds minimum when activated.
 
407.4.6 Inside Dimensions of Elevator Cars. Elevator cars shall provide a clear width of 42 inches (1065 mm) minimum and a clear depth of 54 inches (1370 mm) minimum. For installations in existing buildings. elevator cars shall provide a clear width of 36 inches (915 mm) minimum, a clear depth of 54 inches (1370 mm) minimum, and a net clear platform area of 15 square feet (1.4 m2) minimum. Car doors shall be positioned at the narrow end of the car and shall provide a clear width of 32 inches (815 mm) minimum.
 
407.4.7 Floor Surfaces. Floor surfaces in elevator cars shall comply with 302. The horizontal distance between the car platform sill and the edge of any hoistway landing shall be 1-1/4 inches (32 mm) maximum.
 
407.4.8 Illumination Levels. The level of illumination at the car controls, platform, and car threshold and landing sill shall be 5 footcandles (53.8 lux) minimum.
 
407.4.9 Car Controls. Elevator controls shall comply with 407.2.11.1 through 407.2.11 .3. Controls shall be centered on a side wall and shall comply with 309.
 
407.4.10 Emergency Communications. Car emergency signaling devices complying with 407.2.13 shall be provided.
 
407.5 Existing Elevators. Altered elements of existing destination-oriented elevators shall comply with 407.3. Altered elements of existing limited-use/limited-application elevators shall comply with 407.4. Altered elements of all other existing elevators shall comply with 407.2.1, 407.2.4, 407.2.6, 407.2.7, 407.2.9, 407.2.10 and 407.2.13 and with 407.5.1 through 407.5.7 or shall comply with 407.2. They shall be passenger elevators as classified by ASME/ANSI A17.1.
 
407.5.1 Call Buttons. Call buttons in elevator lobbies and halls shall be located vertically between 35 inches (890 mm) and 54 inches (1370 mm) above the floor, measured to the centerline of the button. A clear floor or ground space complying with 305 shall be provided. The button that designates the up direction shall be located above the button that designates the down direction. Keypad controls, if provided, shall comply with 407.2.11.
 
407.5.2 Hall Signals. A visible and audible signal at each hoistway entrance to indicate which car is answering a call or in-car signals complying with 407.2.3 shall be provided. Audible signals shall sound once for the up direction and twice for the down direction, or shall have verbal annunciators that state the word "up" or "down". If new hall signals are installed, they shall comply with 407.2.3.
 
407.5.3 Door Operation. Power operated horizontally sliding car and hoistway doors opened and closed by automatic means shall comply with 407.2.5. Existing manually operated hoistway swing doors shall comply with 404.2.3 and 404.2.9. A power operated car door that opens and maintains a 32 inches (815 mm) minimum clear width shall be provided. Closing of the car door shall not be initiated until the hoistway door is closed. Car gates are prohibited.
 
407.5.4 inside Dimensions of Elevator Cars. The inside dimensions of elevator cars shall comply with 407.2.8.
EXCEPTION: This requirement shall not apply to existing elevator car configurations that provide a clear floor area of 16 square feet (1.5 m2) minimum, and provide 48 inches (1220 mm) minimum inside clear depth and 36 inches (915 mm) minimum clear width.
 
407.5.5 Car Controls. Elevator controls shall comply with 407.5.5.1 through 407.5.5.4.
 
407.5.5.1 Buttons. Control buttons shall be 3/4 inch (19 mm) minimum in their smallest dimension. Control buttons shall be raised, flush or recessed. Where the car operating panel is changed, control buttons shall comply with 407.2.11.1.
 
407.5.5.2 Designations and indicators for Control Buttons. Control buttons shall comply with 407.2.11.2.
EXCEPTION: Where space on an existing car operating panel precludes tactile markings to the left of the controls, markings shall be placed as near to the control as possible.
 
407.5.5.3 Height. Floor buttons shall be located 54 inches (1370 mm) maximum above the floor for parallel approach and 48 inches (1220 mm) maximum for front approach. Where the panel is changed, it shall comply with 407.2.11.3.
 
407.5.5.4 Operating Panels. Where a new car operating panel complying with 407.2.11 is provided, existing car operating panels not conforming to 407.2.11 shall not be required to be removed.
 
407.5.6 Car Position indicators. Where a new car position indicator is provided, the indicator shall comply with 407.2.12.
 
407.5.7 Identification. Accessible elevators shall be clearly identified with the International Symbol of Accessibility complying with 703.7 unless all elevators in the building are accessible.
 
408 Wheelchair (Platform) Lifts
 
408.1 General. Wheelchair (platform) lifts shall comply with ASME/ANSI A17.1 and with 302, 305 and 309. Wheelchair (platform) lifts shall not be attendant-operated and shall provide unassisted entry and exit from the lift.
 
408.2 Doors and Gates. Where a lift does not allow a user to pass through the lift, the lift shall have power-operated doors or gates. Where automatic doors or gates are provided, they shall be low energy power-operated and shall comply with ANSI/BHMA A156.9. Power operated doors and gates shall remain open for 20 seconds minimum when activated.
 
409 Accessible Means of Egress
 
409.1 General. Each required accessible means of egress shall be continuous to a public way and shall consist of one or more of the following components: accessible routes complying with 402, exit stairways complying with 409.2, elevators complying with 409.3, horizontal exits or smoke barriers. Wheelchair (platform) lifts shall not serve as part of an accessible means of egress.
 
409.2 Exit Stairways. An exit stairway to be considered part of an accessible means of egress shall conform to 504 and shall have a clear width of 48 inches (1220 mm) minimum between handrails and shall either incorporate an area of refuge within an enlarged floor-level landing or shall be accessed from either an area of refuge complying with 410 or a horizontal exit.
EXCEPTIONS:
1. This requirement shall not apply to exit stairways serving a single guest room.
2. This requirement shall not apply to exit stairways in buildings or facilities protected throughout by a supervised automatic sprinkler system.
3. The clear width of 48 inches (1220 mm) between handrails is not required for exit stairways accessed from a horizontal exit.
4. This requirement shall not apply to exit stairways serving open parking garages.
 
409.3 Elevators. An elevator to be considered part of an accessible means of egress shall comply with the requirements of Rule 211 of ASME/ANSI A17.1 and standby power shall be provided. The elevator shall be accessed from either an area of refuge complying with 410 or a horizontal exit.
EXCEPTIONS:
1. Elevators are not required to be accessed from an area of refuge or horizontal exit in open parking garages.
2. Elevators are not required to be accessed from an area of refuge or horizontal exit in buildings and facilities protected throughout by a supervised automatic sprinkler system.
 
410 Areas of Refuge
 
410.1 General. Where areas of refuge are required, they shall comply with 410.
 
410.2 Location. Each area of refuge shall be accessed from the space it serves by an accessible route which serves as an accessible means of egress. The maximum travel distance to an area of refuge shall not exceed the travel distance permitted for the occupancy by the administrative authority. Every area of refuge shall have direct access to an exit stairway complying with 409.2 or an elevator complying with 409.3.
 
410.3 Size. Each area of refuge shall be sized to accommodate one wheelchair space complying with 305.3 for each 200 occupants or portion thereof, based on the occupant load of the area of refuge and all areas served by the area of refuge. Such wheelchair spaces shall not overlap the required means of egress width. Access to any required wheelchair space shall not be through more than one adjoining wheelchair space.
 
410.4 Construction. Each area of refuge shall be separated from the remainder of the story by a smoke barrier having a one-hour minimum fire-resistance rating. Smoke barriers shall extend to the floor or roof deck above. Doors in the smoke barrier shall have a 20 minute minimum fire-resistance rating. Doors shall be self-closing or automatic closing by smoke detection. HVAC openings in smoke barriers, where permitted, shall be ducted and provided with a smoke-actuated damper designed to resist the passage of smoke.
 
410.5 Smoke Resistance. Every area of refuge shall be designed to prevent the intrusion of smoke.
EXCEPTIONS:
1. This requirement shall not apply where the areas of refuge and all areas served by the area of refuge are protected by an automatic sprinkler system.
2. This requirement shall not apply to areas of refuge located within an exit stair enclosure.
 
410.5.1 Elevator Lobby. Where an elevator lobby is used as an area of refuge, the elevator hoistway and lobby shall be pressurized to comply with the requirements for smokeproof enclosures, except where elevators are in an area of refuge formed by a horizontal exit or smoke barrier.
 
410.6 Communication System. Every area of refuge shall be provided with an accessible two-way communication system between the area of refuge and a central control point. The communication system shall have both audible and visible signals.
 
410.7 Instructions. In each area of refuge provided with a two-way communication system, instructions on the use of the area under emergency conditions shall be posted adjacent to the communications system. The instructions shall include:
 
1. Directions to other means of egress.
2. Advice that persons able to use the exit stairs do so as soon as possible unless they are assisting others.
3. Information on planned availability of assistance in the use of stairs or supervised operation of elevators and how to summon such assistance.
4. Directions for use of emergency communications system.
 
410.8 Identification. Each area of refuge shall be identified by a tactile sign stating "Area of Refuge" complying with 703.2 and including the International Symbol of Accessibility complying with 703.7. A sign shall be located at each door providing access to the area of refuge. The sign shall be illuminated as required for exit signs where exit sign illumination is required.







日本財団図書館は、日本財団が運営しています。

  • 日本財団 THE NIPPON FOUNDATION