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shao 发表于 2014-4-4 19:53 : p* t/ h) M8 q2 Z5 }- F8 E; E b
外墙应该没有几十尺吧
8 t. V# B$ B7 Wyes. say you have unit 33x30 FT for (990SqFt). ; \& v( G& r, A/ S& e% B; v
outside wall areas
0 C2 `; f% m( B! g33+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.
8 N6 P! j+ q! \1 c8 ainterior wall area (Party wall and corridor wall) , C2 M9 [$ O5 r# ]
0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt.
" L. k5 B" b. P, X Ladd both together, 50SqFt to over 70SqFt
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0 @8 q5 [' D+ cfor single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)
# J/ v8 [9 A% A! u8 A/ wyour exterior wall area will be 0.5x(24+26)x2=50 SqFt for main floor. 0.5x(24+50)x2=74SqFt for second. - d8 Y, z* {" i5 F
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