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shao 发表于 2014-4-4 19:53 % H5 f. A9 n7 I e% ^ c4 R9 L3 x) `
外墙应该没有几十尺吧 ! V5 W7 M/ Q; _/ z! i- y( a1 v
yes. say you have unit 33x30 FT for (990SqFt). . h3 B! j, }1 n N* j0 R9 F
outside wall areas
! { s# a# L( l' N j2 M) |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.
/ H$ x4 g2 U }8 x% ]5 ]9 Kinterior wall area (Party wall and corridor wall)
: C( v, ^* c& r- T) j$ s" u6 z& X0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt.+ w3 k- i* a, p+ E3 \2 F
add both together, 50SqFt to over 70SqFt
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- G. [2 Z. a6 B3 y0 Wfor single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)# r# |, R1 Q+ }! y
your exterior wall area will be 0.5x(24+26)x2=50 SqFt for main floor. 0.5x(24+50)x2=74SqFt for second. ; y# ?, W6 [. L. {
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