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shao 发表于 2014-4-4 19:53 
9 o* r& I7 X+ q* y) T) T& J* E( s# W6 `: [外墙应该没有几十尺吧
9 @5 ~ u4 s8 V6 R& ~ g$ K/ y8 ryes. say you have unit 33x30 FT for (990SqFt). 2 k/ b) f6 N1 {: g
outside wall areas/ G* W2 j. z0 y) ?& l
33+30 FT outside wall could be anywhere 0.5FT (6" exterior wall width)x63 FT=31.5SqFt or 0.67 FT (sometimes lower floor has 8" exterior wall) x 63FT= 42.21SqFt.( Z0 \) K, d" N% v
interior wall area (Party wall and corridor wall)
" R* f9 {. O n+ v9 A- }0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt.7 x% u. ]$ c: l: I' ^, R, X$ D
add both together, 50SqFt to over 70SqFt
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& M9 Y- r2 Q. k& `. ]+ Q5 nfor single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)5 e; u% T2 Z+ _' ~4 O
your exterior wall area will be 0.5x(24+26)x2=50 SqFt for main floor. 0.5x(24+50)x2=74SqFt for second. - e9 p; p+ {6 a- S% l) z5 D# P
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