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shao 发表于 2014-4-4 19:53 9 y6 s+ K4 _3 v* ]; o8 d
外墙应该没有几十尺吧 + M2 A+ X' y6 a! s, M4 O# q, Y! {
yes. say you have unit 33x30 FT for (990SqFt). $ e( d* g: q5 C
outside wall areas/ H) _( o2 i, _7 K1 E- U
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., s0 L* p, _$ I; q$ y( h
interior wall area (Party wall and corridor wall) * e8 s* R7 `, z, c+ J) S E; G4 [
0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt.
+ g) m, E, W" G* S( madd both together, 50SqFt to over 70SqFt
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for single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)' w* ?* R; R* F( `7 v8 T
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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