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. " EXTERIOR ENVELOPE AVERAOE "U" COMPUTATION <br /> OWNER: S l L�t 5 DATE: d '!2 - 9"1 <br /> S I TE ADDRE S S • 3Z 3 C/llCo Ci�CL.E <br /> CONTRIICTOR: gRUG.E l3�Q�"�! l�oN/�E't /•�C. PHONE: 415- 04l8' <br /> Determine working square footage of each: <br /> 1. Total exposed well area. . 3�oZ sq. ft. x .11 .= y�7. Z <br /> 2. Totel roof/ceilinq aree. . ZIoZ sq. ft. x .026 = 5`f•7 <br /> Total exposed wall area above floor � 3 SS� <br /> a. Total wall window area. . . . . . . . . . . . . . . . . . . . . . . 92Z <br /> b. Total door area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . /NGcan�Co r <br /> c. Total sliding glase door area. . . . . . . . . . . . . . . . nioK� _ <br /> d. Total wall framing area (average 10$) . . . . . . . . . 2�fZ <br /> e. Total net wall area above floor. . . . . . . . . . . . . . . 2 ► 7 8 <br /> f. Total rim joist area. . . . . . . . . . . . . . . . . . . . . . . . ZIZ <br /> . Total exposed foundation area = /4 S�• <br /> g. Total foundation window area. . . . . . . . . . . . . . . . . . -- _ <br /> h. Total net foundation area above grade. . . . . . . . . /48 , <br /> Determine "U" value of each wall segment: <br /> a. 922 x "U" . ZS = 23o.S <br /> b. i,�cchoap x "U" 5/�m4. � <br /> C. N�N E X "U" � _ — <br /> d. 2�f2 X "U" •il = 2� •� <br /> e. Zl7St X ��U,� .oS = f o �6 . 9 <br /> f . 21Z x "U" -O`�' _ � ' S <br /> g, — x ��,� � _ - <br /> h. /4� X �U,� .c11� = S�,q <br /> 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Tota1 = 383 . 4 <br /> If item #3 is less than or equal to item �kl, than the have met the <br /> intent of SBC 6006(c)2 . <br /> . Total exposed roof/ceiling area = ZIo 2 <br /> i. Total roof/ceiling framing area (average 10$) . 21 � <br /> j . Total new insulated roof/ceiling area. . . . . . . . . J �� Z __ <br /> Determine "U" value of each roof/ceiling segment: <br /> i. ZIo x "U" • �Z = �,Z <br /> j . Ig92 x ~v" • • �t = 37•8 <br /> 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Tota1 = NZ� �� <br /> If total of #4 is less than or equal to �k2, than you have met the <br /> intent of SBC 6006(c) 1 . <br /> Alternate Building Envelope Design <br /> To utilize the total envelope system method, the values establiehed <br /> by the sum of items #3 and �4 ahall not be greater than the sum of <br /> items �1 and �2 : <br /> 1. �l o'? • 2 + 2. ��/• '7 = <br /> 3. �Y 3• `I + 4. 7Z�4� _ <br />