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shao 发表于 2014-4-4 19:53 3 x, k, D) V8 s! S( U$ N, e
外墙应该没有几十尺吧 " X0 N# q& A! L. Z9 z7 j: L
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.7 n9 q/ ]" X. k; G1 ~: y8 l6 a
interior wall area (Party wall and corridor wall) - i, n/ E; q( i1 f8 S
0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt. C- W" R% y4 M* L
add both together, 50SqFt to over 70SqFt
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for single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)5 J. x( u8 r- ]% U2 h( {
your exterior wall area will be 0.5x(24+26)x2=50 SqFt for main floor. 0.5x(24+50)x2=74SqFt for second. . U: |' }0 @) Y0 P: r/ P! Q
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