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shao 发表于 2014-4-4 19:53 7 F5 P+ R: g0 H* `, |" ^
外墙应该没有几十尺吧 5 N4 X+ O) }" }) O2 T" V# C4 ~
yes. say you have unit 33x30 FT for (990SqFt). % U1 o; E7 x- |+ L; a/ v
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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.
; J4 {0 e" i8 B. d8 W$ ointerior wall area (Party wall and corridor wall)
$ I- l* z( ~ T$ x0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt.: a# t/ r" d, F& A+ Z0 |! T/ m# D
add both together, 50SqFt to over 70SqFt
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for single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)
7 e: W" c; C3 yyour exterior wall area will be 0.5x(24+26)x2=50 SqFt for main floor. 0.5x(24+50)x2=74SqFt for second. , a8 Y3 \+ ]- J7 w; }# Y* o
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