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shao 发表于 2014-4-4 19:53 5 L0 C- ^! ?# I% n
外墙应该没有几十尺吧 $ r1 P% k! c f# p6 J# V
yes. say you have unit 33x30 FT for (990SqFt).
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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.0 [, s1 m9 L( k, s, o4 j W
interior wall area (Party wall and corridor wall) * ?! [' m- R- B& o+ ^- c- Y, D, }
0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt.( d) r% K- I7 Q& z. J" b
add both together, 50SqFt to over 70SqFt4 G; V& M8 A8 J7 g
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for single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)
: r. z6 P$ c) P' y1 C6 X7 Ayour exterior wall area will be 0.5x(24+26)x2=50 SqFt for main floor. 0.5x(24+50)x2=74SqFt for second.
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