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� height from the floor to the top of the 5. Where located in existing buildings,the ■ <br /> ■ fenestration,and longitudinally from the edge visible transmittance of the fenestration is no : <br /> � of the fenestration to the nearest full height less than 0.20. : <br /> � wall,or up to 2 feet(610 mm),whichever is 6. In parking garages with floor area adjacent to � <br /> : less,as indicated in Figure C405.2.4.2(1).The perimeter wall openings,the daylight zone : <br /> : secondary daylight zone begins at the edge of shall include the area within 20 feet of any : <br /> : the primary daylight zone and extends laterally portion of a perimeter wall that has a net : <br /> : to the nearest full height wall,or up to 2.0 opening to wall ratio of at least 40 percent. : <br /> ; times the height from the floor to the top of the <br /> ; fenestration,whichever is less,as indicated in C405.2.4.3 Toplight daylight zone.The toplight <br /> ' Figure C405.2.4.2(1). daylightzone is the floor area underneath a roof <br /> � 2. Where the fenestration is located in a rooftop fenestration assembly which complies with the <br /> ; monitor,the sidelight daylight zone shall following: <br /> ' extend laterally to the nearest obstruction that 1. The toplight daylight zone shall e�end <br /> ' is taller than 0.7 times the ceiling height,or up laterally and longitudinally beyond the edge of <br /> • to 1.0 times the height from the floor to the the roof fenestration assembly to the nearest <br /> • boitom of the fenestaation,whichever is less, obstruction that is taller than 0.7 times the <br /> ■ and longitudinally from the edge of the ceiling height,or up to 0.7 times the ceiling <br /> ■ fenestration to the nearest obstruction that is height,whichever is less,as indicated in <br /> % taller than 0.7 times the ceiling height,or up to Figure C405.2.43(1). <br /> : 0.25 times the height from the floor to the 2. Where toplight daylight zones overlap with � <br /> : bottom of the fenestration,whichever is less, sidelight daylight zones,lights within the . <br /> ; as indicated in Figures C405.2.4.2(2)and overlapping area shall be assigned to the : <br /> : C405.2.4.2(3). toplight daylight zone. : <br /> • 3. Where clerestory fenestration is located in a 3. Where located in eacisting buildings,the <br /> : wall,the sidelight daylight zone includes a product of the visible transmittance of the roof <br /> : lateral area twice the depth of the clerestory fenestration assembly and the area of the <br /> : fenestration height,projected upon the floor at rough opening of the roof fenestration <br /> ; a 45 degree angle from the center of the assembly,divided by the area of the daylight <br /> ; clerestory fenestration.The longitudinal width zone is no less than 0.008. <br /> ; of the daylight zone is calculated the same as 4. Where located under atrium fenestration,the ■ <br /> ; for fenestration located in a wall.Where the 45 daylight zone shall include the bottom floor : <br /> � degree angle is interrupted by an obstrucrion area directly beneath the atrium fenestration, : <br /> ■ greater than 0.7 times the ceiling height,the and the top floor directly under the atrium : <br /> � daylight zone shall remain the same lateral fenestration,as indicated in Figure � <br /> � area but be located between the clerestory and C405.2.4.3(2}.The daylight zone area at the � <br /> ■ the obstruction,as indicated in Figure top floor is calculated the same as for a . <br /> : C405.2.4.2(4). toplight daylight zone.Intermediate levels : <br /> % 4. If the rough opening area of a vertical below the top floor that are not directly � <br /> � fenestration assembly is less than 10 percent of beneath the atrium are not included. � <br /> ■ the calculated primary daylight zone area for ■ <br /> : this fenestration,it does not qualify as a <br /> daylight zone. <br /> CE-78 2015 Washington State Energy Code <br />