CC WORKSESSION 01292008 - Laserfiche WebLink

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CHAPTER 4 LIGHT, VENTILATION AND OCCUPANCY LIMITATIONS SECTION 401 GENERAL 401.1 Scope. The provisions of this chapter shall govern the minimum conditions and standards for fight, ventilation and space for occupying a structure. 401.2 Responsibility. The owner of the structure shall provide and maintain light, ventilation and space conditions in compli- ance with these requirements. A person shall not occupy as owner - occupant, or permit another person to occupy, any pre- mises that do not comply with the requirements of this chapter. 401.3 Alternative devices. In lieu of the means for natural light and ventilation herein prescribed, artificial light or mechanical ventilation complying with the International Building Code shall be permitted. SECTION 402 LIGHT 402.1 Habitable spaces. Every habitable space shall have at least one window of approved size facing directly to the out- doors or to a court. The minimum total glazed area for every habitable space shall be 8 percent of the floor area of such room. Wherever walls or other portions of a structure face a window of any room and such obstructions are located less than 3 feet (914 mm) from the window and extend to a level above that of the ceiling of the room, such window shall not be deemed to face directly to the outdoors nor to a court and shall not be included as contributing to the required minimum total window area for the room. Exception: Where natural light for rooms or spaces without exterior glazing areas is provided through an adjoining room, the unobstructed opening to the adjoining room shall be at least 8 percent of the floor area of the interior room or space, but not less than 25 square feet (2.33 m2). The exte- rior glazing area shall be based on the total floor area being served. 402.2 Common halls and stairways. Every common hall and stairway in residential occupancies, other than in one- and two- family dwellings, shall be lighted at all times with at least a 60- watt standard incandescent light bulb for each 200 square feet (19 m2) of floor area or equivalent illumination, provided that the spacing between lights shall not be greater than 30 feet (9144 mm). In other than residential occupancies, means of egress, including exterior means of egress, stairways shall be illuminated at all times the building space served by the means of egress is occupied with a minimum of 1 footcandle (11 lux) at floors, landings and treads. 402.3 Other spaces. All other spaces shall be provided with natural or artificial light sufficient to permit the maintenance of sanitary conditions, and the safe occupancy of the space and utilization of the appliances, equipment and fixtures. SECTION 403 VENTILATION 403.1 Habitable spaces. Every habitable space shall have at least one openable window. The total openable area of the win- dow in every room shall be equal to at least 45 percent of the minimum glazed area required in Section 402.1. Exception: Where rooms and spaces without openings to the outdoors are ventilated through an adjoining room, the unobstructed opening to the adjoining room shall be at least 8 percent of the floor area of the interior room or space, but not less than 25 square feet (2.33 m2). The ventilation open- ings to the outdoors shall be based on a total floor area being ventilated. 403.2 Bathrooms and toilet rooms. Every bathroom and toi- let room shall comply with the ventilation requirements for habitable spaces as required by Section 403.1, except that a window shall not be required in such spaces equipped with a mechanical ventilation system. Air exhausted by a mechanical ventilation system from a bathroom or toilet room shall dis- charge to the outdoors and shall not be recirculated. 4033 Cooking facilities. Unless approved through the certifi- cate of occupancy, cooking shall not be permitted in any room- ing unit or dormitory unit, and a cooking facility or appliance shall not be permitted to be present in the rooming unit or dor- mitory unit. Exceptions: 1. Where specifically approved in writing by the code official. 2. Devices such as coffee pots and microwave ovens I shall not be considered cooking appliances. 403.4 Process ventilation. Where injurious, toxic, irritating or noxious fumes, gases, dusts or mists are generated, a local exhaust ventilation system shall be provided to remove the con- taminating agent at the source. Air shall be exhausted to the exterior and not be recirculated to any space. 403.5 Clothes dryer exhaust. Clothes dryer exhaust systems shall be independent of all other systems and shall be exhausted in accordance with the manufacturer's instructions. SECTION 404 OCCUPANCY LIMITATIONS 404.1 Privacy. Dwelling units, hotel units, housekeeping units, rooming units and dormitory units shall be arranged to provide privacy and be separate from other adjoining spaces. 404.2 Minimum room widths. A habitable room, other than a kitchen, shall not be less than 7 feet (2134 mm) in any plan dimension. Kitchens shall have a clear passageway of not less 2006 INTERNATIONAL PROPERTY MAINTENANCE CODE* 13