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shao 发表于 2014-4-4 19:53 $ r m" {& V( [2 H
外墙应该没有几十尺吧
) W" K- t3 m6 y! byes. say you have unit 33x30 FT for (990SqFt).
# _( K, p: {$ E8 w# d, S3 }# Ioutside wall areas- b4 z0 g. Y( _5 l2 f
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.
w) [3 M) A) ^0 f0 s. \interior wall area (Party wall and corridor wall) : R2 V6 e; ^1 B! W
0.33FT (4" wall) x 63FT = 21SqFt or 0.5 FT x 63 FT=31.5 SqFt.
3 y3 H, V; j! Z) \add both together, 50SqFt to over 70SqFt n& q* D, E" e$ z) V( s8 ^- N, q7 p
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for single house, say 1800SqFt (main floor 24x26=624SqFt + second floor 24x50=1200SqFt)$ Y' w' V5 d( _
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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