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shao 发表于 2014-4-4 19:53 6 b' ~9 i9 j5 _$ p4 y# s5 T
外墙应该没有几十尺吧 3 k1 e$ ~; y/ N) b& _
yes. say you have unit 33x30 FT for (990SqFt). 4 g$ {$ x) d0 E* A
outside wall areas
# u" W9 R8 _/ X8 X( H, F& s33+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.! _) i# N7 M/ \# H# e: o8 ` m5 @
interior wall area (Party wall and corridor wall)
& H' v a5 e& I8 y. _0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt., K, W9 s4 p2 T0 S
add both together, 50SqFt to over 70SqFt; t1 D# H, y( Z% w2 N
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for single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)/ o- }3 ]1 A6 X6 \5 B. \; ?/ ~
your 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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