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shao 发表于 2014-4-4 19:53 3 U0 c @) T: R: e: J
外墙应该没有几十尺吧
9 X( U# ?. N' i8 R5 Y2 T ~2 syes. 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.
2 a- D& x3 c* k% u# Kinterior wall area (Party wall and corridor wall)
1 _5 A7 T+ ~" M; a% p: j% l `, E0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt.; j. V( i: D; E
add both together, 50SqFt to over 70SqFt4 O- C0 ] Q9 c3 I2 ]/ `
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for single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)
, `( Z1 U& b5 Y4 u9 uyour 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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