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shao 发表于 2014-4-4 19:53 9 L0 X% G1 R/ f/ n9 X
外墙应该没有几十尺吧 8 k' o( F: [9 q4 e/ y8 c7 i' o% ]% z
yes. say you have unit 33x30 FT for (990SqFt). ) @- z6 C2 z, e; F, j" q
outside wall areas
* y/ B2 k: E. `1 ^- U8 @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.. \9 U) q( O4 N5 @
interior wall area (Party wall and corridor wall) 9 R; g; m% L% ~* V9 R, J2 b" b
0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt., `. A$ X5 b7 f9 \+ \+ g
add both together, 50SqFt to over 70SqFt
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for single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)
% r, p7 }1 _; J1 J7 I8 Uyour exterior wall area will be 0.5x(24+26)x2=50 SqFt for main floor. 0.5x(24+50)x2=74SqFt for second. . b N0 ]) _8 J7 G; O
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