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shao 发表于 2014-4-4 19:53 # {) q" u9 p+ z z7 q; i# g
外墙应该没有几十尺吧 1 P [$ i9 P7 ?0 n+ s
yes. say you have unit 33x30 FT for (990SqFt). 0 T4 @) M9 X" L3 m
outside wall areas
7 Q# M) p0 R- }3 V. c- j9 t33+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., L( m7 w3 H/ e4 e! h! ?8 k
interior wall area (Party wall and corridor wall)
8 c- V+ C" W4 }2 I0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt.
6 e2 O6 x+ @1 p1 h! F! \9 ^% padd both together, 50SqFt to over 70SqFt, G" V* n0 E) k, G2 W2 ^$ m, T8 c
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for single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)& @4 T. X; h) H" }
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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