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shao 发表于 2014-4-4 19:53 + L% V4 W+ @- X/ v. b$ e# Z
外墙应该没有几十尺吧
- r3 c. G3 w, ]- c. e" Wyes. say you have unit 33x30 FT for (990SqFt).
+ p, K& g9 H/ E6 [" woutside wall areas3 w6 v8 {* [( j# v0 O5 ?/ x e4 W/ j
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.$ N9 z) q) k [/ u
interior wall area (Party wall and corridor wall) / N- k4 z3 g9 r8 w3 m+ o& ?% E1 o
0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt., F, y6 P! ]5 X0 I( D
add both together, 50SqFt to over 70SqFt
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for single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)
, r) ^( p- d1 z: M* X9 I5 X2 O6 m; Jyour 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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