Chapter 17.12
DEFINITIONS
Sections:
17.12.090 Gasoline/Service Station
17.12.120 Horizontal Illuminance
17.12.153 Initial Assessed Value
17.12.155 Initial Gross Floor Area
17.12.180 Landscaping or Landscaping Materials
17.12.270 Single-Family Residential Dwelling Unit
17.12.280 Transitional Lighting
17.12.300 Uniform Building Security Code (UBSC)
17.12.320 Vertical Illuminance
17.12.010 Barrier Plant
A plant that consists of dense structure and/or foliage that is thorny or has needles that provide a formidable barrier which is difficult to penetrate. (Ord. 03-1033 § 11)
17.12.015 Blank Wall
Any wall or portion of a wall that is located within forty (40) feet of a street or pedestrian-only corridor and is without a ground level window, door or facade opening along any street-facing facade section of twenty (20) feet in length or more. (Ord. 03-1033 § 11)
17.12.020 Brightness
Brightness is a subjective term used to describe perception of the amount of light that reaches our eyes. (Ord. 03-1033 § 11)
17.12.025 Canopy
A freestanding structure affording protection from the elements to persons or property thereunder. (Ord. 03-1033 § 11)
17.12.030 Color Rendition
A general expression for the ability of a light source to faithfully reproduce the colors seen in an object. (Ord. 03-1033 § 11)
17.12.050 CPTED
CPTED means Crime Prevention Through Environmental Design. CPTED is the proper design and effective use of the built environment in order to reduce the fear and incidence of crime, and improve the quality of life. (Ord. 03-1033 § 11)
17.12.060 CPTED Section
The division of the SeaTac Police Department and the division of the City’s Department of Community and Economic Development that is responsible for reviewing and approving all plans submitted pursuant to this title. (Ord. 11-1002 § 2; Ord. 03-1033 § 11)
17.12.070 Dwelling Unit
Any building or portion thereof which contains living facilities, including provisions for sleeping, eating, cooking, and sanitation for not more than one (1) family. (Ord. 03-1033 § 11)
17.12.080 Footcandle
(Abbreviated “fc”). A measure of light striking a surface one (1) square foot in area on which one (1) unit of light (lumen) is uniformly distributed. (Ord. 03-1033 § 11)
17.12.090 Gasoline/Service Station
A gasoline and/or service station with or without an associated convenience food mart. (Ord. 03-1033 § 11)
17.12.100 Glare
The reflection of harsh, bright light, or the physical effect resulting from high luminance or insufficiently shielded light sources in the field of view. (Ord. 03-1033 § 11)
17.12.105 Glare Shield
Shields of opaque or translucent materials shaped to reduce or eliminate the direct view of the lamp from outside the luminaire. (Ord. 03-1033 § 11)
17.12.110 Gross Floor Area
The gross floor area is the area within the inside perimeter of the exterior walls of the building under consideration, exclusive of vent shafts and courts, without deduction for corridors, stairways, closets, the thickness of interior walls, columns or other features. The gross floor area of a building, or portion thereof, not provided with surrounding exterior walls shall be the usable area under the horizontal projection of the roof or floor above. The gross floor area shall not include shafts with no openings or interior courts. (Ord. 03-1033 § 11)
17.12.120 Horizontal Illuminance
The measurement of light illuminating a horizontal surface at grade. (Ord. 03-1033 § 11)
17.12.130 Identification Sign
A sign that includes as copy only the name of the business, place, organization, building or person it identifies. (Ord. 03-1033 § 11)
17.12.140 IESNA
Standards for lighting and illumination are established by the Illuminating Engineering Society of North America. IESNA standards are summarized in the IESNA Lighting Handbook. (Ord. 03-1033 § 11)
17.12.145 IESNA Handbook
IESNA Lighting Handbook, 9th Edition, 2000, by the Illuminating Engineering Society of North America, New York, NY. (Ord. 03-1033 § 11)
17.12.150 Illuminance
The concentration of light over a particular area, as measured in footcandles (fc), the number of lumens per square foot. (Ord. 03-1033 § 11)
17.12.153 Initial Assessed Value
The value as assessed by King County at the time that the construction permit application is received. (Ord. 03-1033 § 11)
17.12.155 Initial Gross Floor Area
The gross floor area, as measured at the time the construction permit application is received. (Ord. 03-1033 § 11)
17.12.160 Isofootcandle Line
A line plotted on any appropriate set of coordinates to show all the points on a surface where the illuminance is the same. A series of such lines for various illuminance values is called an isofootcandle diagram. (Ord. 03-1033 § 11)
17.12.170 Lamp
The manufactured light source, not the supporting fixture. (Ord. 03-1033 § 11)
17.12.180 Landscaping or Landscaping Materials
Any tree, shrub, groundcover, vine, or other organic and inorganic materials, or combination of any of these elements, placed on a site or exterior of a building to enhance appearance. Public art, water features, plazas, patios, decorative courtyards and lighting may also be considered landscape elements. (Ord. 03-1033 § 11)
17.12.190 Lighting District
A consolidation of the zoning districts established under SMC Title 15 into districts with distinct lighting standards as follows:
A. Lighting District 1 consists of the following districts: Industrial (I), Office/Commercial Medium (OCM), Office/Commercial/Mixed Use (O/C/MU), Neighborhood Business (NB), Community Business (CB), Business Park (BP), and Aviation Commercial (AVC).
B. Lighting District 2 shall consist of the area within the City Center boundary.
C. Lighting District 3 consists of the following higher density residential districts: UM-3600, UM-2400, UH-1800, UH-900, Mobile Home Park (MHP), and UH-UCR.
D. Lighting District 4 consists of the following low-density residential districts: UL-15000, UL-9600, UL-7200, and UL-5000. (Ord. 03-1033 § 11)
17.12.200 Lumens
The measured quantity of light emitted by a lamp. Different wattages and type of bulbs emit different levels. For example, a typical household incandescent one hundred (100) watt light bulb emits approximately one thousand seven hundred (1,700) lumens. (Ord. 03-1033 § 11)
17.12.210 Luminaire
The complete lighting unit consisting of the lamp, its holder, and the reflectors and diffusers used to distribute and focus the light. (Ord. 03-1033 § 11)
17.12.220 Mounting Height
The vertical distance from the grade elevation of the surface being illuminated to the bottom of the lighting fixture (i.e., luminaire). (Ord. 03-1033 § 11)
17.12.230 Nonresidential
Any uses or occupancies which are not residential as defined in this section. (Ord. 03-1033 § 11)
17.12.250 Residential
Uses or occupancies upon which one or more dwelling units are located. (Ord. 03-1033 § 11)
17.12.260 Shrub
A woody plant having more than one (1) stem, each less than two (2) inches in diameter, a height of less than ten (10) feet, and an undefined crown. (Ord. 03-1033 § 11)
17.12.270 Single-Family Residential Dwelling Unit
Any building which contains no more than two (2) dwelling units. Including, but not limited to: single attached dwelling units, single detached dwelling units, duplexes, manufactured homes, mobile homes, and modular homes. (Ord. 03-1033 § 11)
17.12.280 Transitional Lighting
A gradual increase or decrease in footcandles of light going from one activity to another, minimizing glare or intrusive light. (Ord. 03-1033 § 11)
17.12.290 Tree
A woody plant, which, at maturity, has one (1) well-defined trunk at least two (2) inches in diameter, a height of at least ten (10) feet, and a formed crown of foliage. (Ord. 03-1033 § 11)
17.12.300 Uniform Building Security Code (UBSC)
Appendix Chapter 10 of the Uniform Building Code that establishes minimum standards designed to make dwelling units resistant to unlawful entry. (Ord. 03-1033 § 11)
17.12.310 Uniformity Ratio
In this context, uniformity ratio is a measure of the dispersion of light on an area. The ratio is measured either as average light level to minimum light level, or maximum light level to minimum light level. Close uniformity ratios help eliminate places to hide, give better depth perception, and a greater feeling of security to individuals in the area. (Ord. 03-1033 § 11)
17.12.320 Vertical Illuminance
A term used for measuring light illuminating a vertical surface. For the purposes of this title, vertical illuminance will be measured at a height of five (5) feet. (Ord. 03-1033 § 11)
17.12.330 Walkway
Any area that is intended for use by pedestrians, including, but not limited to, sidewalks. (Ord. 03-1033 § 11)
17.12.340 Zoning Code
SMC Title 15 as constituted and thereafter amended. (Ord. 03-1033 § 11)