Product Selection Guide Page 693 Product Selection Guide-11th Edition

PRODUCT INFORMATION 693 PSG11 GENERAL INFORMATION Safety Codes www.lithonia.com 2009 INTERNATIONAL BUILDING CODE SECTION 1006 MEANS OF EGRESS ILLUMINATION 1006.1 Illumination required. The means of egress, including the exit discharge, shall be illuminated at all times the building space served by the means of egress is occupied. Exceptions: (1) Occupancies in Group U. (2) Aisle accessways in Group A. (3) Dwelling units and sleeping units in Groups R-1, R-2 and R-3. (4) Sleeping units of Group I occupancies. 1006.2 Illumination level. The means of egress illumination level shall not be less than 1 foot-candle (11 lux) at the walking surface. Exception: For auditoriums, theaters, concert or opera halls and similar assembly occupancies, the illumination at the walking surface is permitted to be reduced during perform ances to not less than 0.2 foot-candle (2.15 lux), provided that the required illumination is automatically restored upon activation of a premises' fire alarm system where such system is provided. 1006.3 Illumination emergency power. The power supply for means of egress illumination shall normally be provided by the premises' electrical supply. In the event of power supply failure, an emergency electrical system shall automatically illuminate all of the following areas: (1) Aisles and unenclosed egress stairways in rooms and spaces which require two or more means of egress. (2) Corridors, exit enclosures and exit passageways located in buildings required to have two or more exits. (3) Exterior egress components at other than their levels of exit discharge until exit discharge is accomplished for buildings required to have two or more exits. (4) Interior exit discharge elements, as permitted in Section 1027.1, in buildings required to have two or more exits. (5) Exterior landings as required by Section 1008.1.6 for exit discharge doorways in buildings required to have two or more exits. The emergency power system shall provide power for a duration of not less than 90 minutes and shall consist of storage batteries, unit equipment or an on-site generator. The installation of the emergency power system shall be in accordance with Chapter 27. 1006.4 Performance of system. Emergency lighting facilities shall be arranged to provide initial illumination that is at least an average of 1 foot-candle (11 lux) and a minimum at any point of 0.1 foot-candle (1 lux) measured along the path of egress at floor level. Illumination levels shall be permitted to decline to 0.6 foot-candle (6 lux) average and a minimum at any point of 0.06 foot-candle (0.6 lux) at the end of the emergency lighting time duration. A maximum-to-minimum illumination uniformity ratio of 40 to 1 shall not be exceeded. SECTION 1011 EXIT SIGNS 1011.1 Where required. Exits and exit access doors shall be marked by an approved exit sign readily visible from any direction of egress travel. The path of egress travel to exits and within exits shall be marked by readily visible exit signs to clearly indicate the direction of egress travel in cases where the exit or the path of egress travel is not immediately visible to the occupants. Intervening means of egress doors within exits shall be marked by exit signs. Exit sign placement shall be such that no point in an exit access corridor or exit passageway is more than 100 feet (30480 mm) or the listed viewing distance for the sign, whichever is less, from the nearest visible exit sign. Exceptions: (1) Exit signs are not required in rooms or areas that require only one exit or exit access. (2) Main exterior exit doors or gates that are obviously and clearly identifiable as exits need not have exit signs where approved by the building official. (3) Exit signs are not required in occupancies in Group U and individual sleeping units or dwelling units in Group R-1, R-2 or R-3. (4) Exit signs are not required in dayrooms, sleeping rooms or dormitories in occupancies in Group I-3. (5) In occupancies in Groups A-4 and A-5, exit signs are not required on the seating side of vomitories or openings into seating areas where exit signs are provided in the concourse that are readily apparent from the vomitories. Egress lighting is provided to identify each vomitory or opening within the seating area in an emergency. 1011.2 Illumination. Exit signs shall be internally or exter- nally illuminated. Exception: Tactile signs required by Section 1011.3 need not be provided with illumination. 1011.3 Tactile exit signs. A tactile sign stating EXIT and complying with ICC A117.1 shall be provided adjacent to each door to an egress stairway, an exit ramp, an exit passageway and the exit discharge. 1011.4 Internally illuminated exit signs. Electrically powered, self-luminous and photoluminescent exit signs shall be listed and labeled in accordance with UL 924 and shall be installed in accordance with the manufacturer's instructions and Chapter 27. Exit signs shall be illuminated at all times. 1011.5 Externally illuminated exit signs. Externally illuminated exit signs shall comply with Sections 1011.5.1 through 1011.5.3. 1011.5.1 Graphics. Every exit sign and directional exit sign shall have plainly legible letters not less than 6 inches (152 mm) high with the principal strokes of the letters not less than 3/4 inch (19.1 mm) wide. The word "EXIT"shall have letters having a width not less than 2 inches (51 mm) wide, except the letter "I,"and the minimum spacing between letters shall not be less than 3/8 inch (9.5 mm). Signs larger than the minimum established in this section shall have letter widths, strokes and spacing in proportion to their height. The word "EXIT"shall be in high contrast with the background and shall be clearly discernible when the means of exit sign illumination is or is not energized. If a chevron directional indicator is provided as part of the exit sign, the construction shall be such that the chevron directional indicator cannot be readily changed. 1011.5.2 Exit sign illumination. The face of an exit sign illuminated from an external source shall have an intensity of not less than 5 foot-candles (54 lux). 1011.5.3 Power source. Exit signs shall be illuminated at all times. To ensure continued illumination for a duration of not less than 90 minutes in case of primary power loss, the sign illumination means shall be connected to an emergency power system provided from storage batteries, unit equipment or an on-site generator. The installation of the emergency power system shall be in accordance with Chapter 27. Exception: Approved exit sign illumination means that provide continuous illumination independent of external power sources for a duration of not less than 90 minutes, in case of primary power loss, are not required to be connected to an emergency electrical system. Portions of this publication reproduce content from the 2009 International Building Code. International Code Council, Inc., Country Club Hills, Illinois. Reproduced with permission. All rights reserved. LITHONIA LIGHTING EMERGENCY SYSTEMS

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