Essay
An 11- in. thick precast concrete curtain wall consists of a 3- in.- thick exterior layer of (normal- weight)concrete, 6- in.- thick interior layer of (normal- weight)concrete and a 2- in- thick XPS insulation sandwiched between the two concrete layers. What is the total R- value of the assembly, considering air- to- air heat transfer? q- value of normal- weight concrete = 0.15; q- value of XPS = 5.0
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R- value of 3- in- thick concrete layer ...View Answer
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