4727 EVERGREEN WAY B 2017 Plans 2022-11-28

� $ . e height&am the floor to the tc�p of t1�e 5. GV�ere located in existing buzidin�s,t�ze a 2 � fenestratian,and�angitudinally txorn the ed�e visiblc trat�s�ittance of t�Ze fenestration is no � �` '`, � af the fenestration tc�the nearest futl height less than 0.2Q. � � ` , � z�all,or ap ta 2 feet(E�1{}mtn),wl�i�hevex.is 6. Zn pat�kuig aarages with flr�oz�area adjacer�t ta � . � less,as indieated in Figure f��t}5.2.4.2(1}.The perime�er wall openings,the daylight zc�zze � � secondary daylight zone begins at the edge of shall inctude the area within 20 fe�t c�f azzy � � t��primar�r daylight zon�and extends Iaterally por[ion of a parizneter u�all that has a net e � , to th�nearzst fall htiig�Zt waLl,ar up ta 2.{� ope�ung ta wa31 ratio af at least 40 pereeut, H � tixnes t�Ze height from ihe floor to tha tap ofthe � f�nesEration,whichever is less, as zz2dicated'zt� , C�05,2.4.3 Topl'zght daylig�t z�ne,�'h�toplzg�lt � �igure C.�C}5.2.4.2(1). r�crylight zon�is the floar area und�zneath a raof . � 2. Where the feneatration is Iocateci in a roof�op f�nes#ratXon assembly w�iich cos�plies with tt�e � rnonitor,the sidelight dayligbt zo�e sha11 . f.ollpwing: � extend iaterally to the nearest obstruction that ' 1. `�`he toplight daylzght zone s3�a1�extenci ° is taller tkzan 0.7 times the cezlzng height,c�r up iateratly and Iongztudinatly beyoszd t��e edge of � to 2.0 times the hez�ht from the£loor to the the roaf feneshation asse��bly to the nearest � bQttom of the fenestratia�,whichever is less, flbstniction that is tailer thar�0.7 iimes the � and longitu�iina�ly from the edge of the ceiling tzeight,ar up to 0.7#imes the c�iting g fetlestratzan to the nearest obstruction tkza�is heiglit,�vhic�ev�r is Iess,as 3ndicated'zn e t2l�er than 0.'7 times the ceiling height,ar up to Fzguz'e C405.�.=�.3(1}. � 0.25 t3mes fhe height from the Iloor to the 2. Wfaere toplig�t daylight xanas overlap with g n bottam of the fen�strrztaon,ivia�chever is I�ss, sidelight daylight zanes,lights withln the e � as indicated in Figures C�05.�.4.2(�)and overlapping area shall be assigned to tha a � �405.2.4.2(3). toplight dayli�ht zone. e � 3. ��here eterestrary fenestrataQn zs Iocated in a 3. Where lacated in e�sting buildings,the . m wall,the sidelight dayli�Iat zane inciudes a product ofthe visible transmittance of the r�af � lateral area twice the depth ofthe clerestory fenestration assembly and th�area of the a fenestration hezght,pxojected upan the flc�ar at rc�uglz openiz�g o�the raof f4nes�ration � a 45 d�gree atzgle fros�the center of the assesnbty,divided by tha area afth�daylighf a clerestory fenestratio�z.'I'he Ionbihadinal widfh zone is no less than D.04$. � ` of t�ie daylight zone is calculated the sa�ne as 4. Where locatec3 urzcler��rium fenestratiazi,the � j � fnr fen�stration located in a wall.Where the 45 daylzght zozze sh�ll incFude the bot[am Iloc�r � � A de�ree angle is interruptad by an obstruction area d'rrectSy banea�z tl�e atrium fenestration, � � � �reater than Q.`7 tirnes the ceiling height,the anc�the top kloor directly under t��:dtrium � � a dayli�i�zt zane shalZ remain the sarr�e lateral fenesErafion,as indicated in Figure o � garea but be located between the clerestory and C4a5.2��.3(2}.2'he daylight zane area at th� H � � the abstruction,as irzdicated i.n�'igure top flac�r is calcuiate�th�sazr�e as fbr a . . C�05.�.4:?{4}. t�plig�at dayli�ht zone. Er�termeciiate levels � � �. rfthe rough apening area of a v�rtical bel�v,�the top floor that az'e uof directLy a � fenestration asseznbly is l�ss than 1 Q percant of b�neath the atrium are not ix�cluded. $ g the caiculated pz-imary daylight zone area fflr g : this fenestratzon,it does tze�t quaiify as a r � daylight zQne. ,�:� ` � i � . CE-78 2Q151Nashinc�ton Sfafe Energy Gode