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shao 发表于 2014-4-4 19:53 8 g+ m% K% v$ o/ t1 C9 y, I, x U
外墙应该没有几十尺吧 1 z& \. P: @# D0 k
yes. say you have unit 33x30 FT for (990SqFt). 8 u1 Q* x5 f- h4 q: \& Z
outside wall areas
1 c# s+ z0 E! o, a6 P. E33+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.' N; x, R) D6 a( g# E& k. }+ |
interior wall area (Party wall and corridor wall) 9 }: ?' e4 w8 S6 R- g
0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt.# N- h" z; i5 e) Z3 Z" @7 N
add both together, 50SqFt to over 70SqFt" x% H9 X$ t1 |8 n0 g( d
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for single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)
; Z& X8 c" t, i+ J4 U1 [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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