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shao 发表于 2014-4-4 19:53 
6 G/ s6 L, Z+ J* d& T外墙应该没有几十尺吧
' M4 q. `7 f4 N0 s& {; s8 b5 Kyes. say you have unit 33x30 FT for (990SqFt). ! {9 }1 @3 T% y3 T- E
outside wall areas
3 g2 [4 {: U+ e7 N0 k0 i33+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.
4 D$ M0 q0 Y+ T5 { Linterior wall area (Party wall and corridor wall)
( l$ h7 w* M) u1 a3 A0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt.
0 K4 c: r3 S) ?5 m$ n6 b" `add both together, 50SqFt to over 70SqFt0 T; ], w& @3 P$ v) h- ]9 t, m6 t4 U
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for single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)" s' N# t7 r# @; ?0 |" |
your exterior wall area will be 0.5x(24+26)x2=50 SqFt for main floor. 0.5x(24+50)x2=74SqFt for second. 4 \) s5 Y' L0 Z, q1 k& z* U, O, A
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