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shao 发表于 2014-4-4 19:53 
2 V9 @9 `- P. m, f3 V' R. y' D9 X外墙应该没有几十尺吧
. n; y, H5 s! _; c: xyes. say you have unit 33x30 FT for (990SqFt). & }, M. {+ F$ o/ {0 ~9 \! m
outside wall areas
2 a7 x/ U# i+ r. F2 i3 n% D33+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.
# F) u; S- C" S, r1 Iinterior wall area (Party wall and corridor wall)
- Q. A6 I+ }8 m* }) c: d+ z0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt.
! G, w. f+ t7 g* R3 k- Madd both together, 50SqFt to over 70SqFt) q# c+ q+ g) t5 {1 A" d
) c4 g% B% i9 {: `+ K0 a0 Vfor single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)
- n/ P7 y! Q* c. }* x2 wyour exterior wall area will be 0.5x(24+26)x2=50 SqFt for main floor. 0.5x(24+50)x2=74SqFt for second. ! d* i L8 G/ w% a# H! F( o3 l. C6 c
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