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Calculate the U-value for the attic joists in the picture. Management: Ignore the post that supports the high leg. The composite layer is in the joist layer – 45×170 joists and 150 mm loose wool. The thin panel's layer can be considered an unventilated air gap 23mm, R= 0.16 m2K/W. Rsu = 0.13 m2K/W, for cold wind Rsi = 0.1 m2K/W, (inside) for roof Answer: 0.128 W/m2 · °C

Calculate the U-value for the attic joists in the picture. Management: Ignore the post that supports the high leg. The composite layer is in the joist layer – 45×170 joists and 150 mm loose wool. The thin panel's layer can be considered an unventilated air gap 23mm, R= 0.16 m2K/W. Rsu = 0.13 m2K/W, for cold wind Rsi = 0.1 m2K/W, (inside) for roof Answer: 0.128 W/m2 · °C

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Calculate the U-value for the attic joists in the picture.
Management:


Ignore the post that supports the high leg.
The composite layer is in the joist layer – 45×170 joists and 150 mm loose wool.
The thin panel's layer can be considered an unventilated air gap 23mm, R= 0.16 m2K/W.
Rsu = 0.13 m2K/W, for cold wind
Rsi = 0.1 m2K/W, (inside) for roof

Answer: 0.128 W/m2 · °C

TATSKIKT AV PAPP TRAPANEL, 23 RASPONT 45x170 HÖGBEN MU 320 LÖSULL (MINERAL ULL) λ=0,042 W/(m°C) 45x170 BJÄLKLAG. $1200 λ = 0,14 W/(m-°C) ÅNGSPARR GLESPANEL 23x70, $300 13 GIPSSK IVA λ=0,25 W/(m-°C) 45x95 STOLPE
Transcribed Image Text:TATSKIKT AV PAPP TRAPANEL, 23 RASPONT 45x170 HÖGBEN MU 320 LÖSULL (MINERAL ULL) λ=0,042 W/(m°C) 45x170 BJÄLKLAG. $1200 λ = 0,14 W/(m-°C) ÅNGSPARR GLESPANEL 23x70, $300 13 GIPSSK IVA λ=0,25 W/(m-°C) 45x95 STOLPE
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