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shao 发表于 2014-4-4 19:53 ! t) y1 H4 X* v0 ^5 T
外墙应该没有几十尺吧
; L# ?- p' f- iyes. say you have unit 33x30 FT for (990SqFt). 3 G! i, j9 x! g9 d: a0 S; ]7 R
outside wall areas8 Z7 z% ?) I7 l9 `, b- J1 s
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.
. |) M! {' S8 B, B) zinterior wall area (Party wall and corridor wall) , A& v3 j* K$ u( K" r+ r7 s
0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt.
& i u7 F1 q# Oadd both together, 50SqFt to over 70SqFt7 a) k/ p4 q5 a7 `6 V' |% J8 C
& n" |& j8 J) y4 mfor single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)
$ v2 p% S: ? E9 vyour 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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