Draw Roof / Ceiling - 9.5 mm Gib standard plasterboard. - 65 x 35 ceiling battens @400 mm centres. 90 x 45 roof trusses @900mm centres - Fibreglass insulation, 50 mm thick, R-value 0.8 - Assume flat roof, 100 mm stagnant air gap between top of insulation and underside of concrete roof tiles. - Concrete roof tiles – model as flat continuous sheet, 20mm thick, (k~0.55 W.m-1.K-1)

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Roof / Ceiling - 9.5 mm Gib standard plasterboard. - 65 x 35 ceiling battens @400 mm centres. 90 x 45 roof trusses @900mm centres - Fibreglass insulation, 50 mm thick, R-value 0.8 - Assume flat roof, 100 mm stagnant air gap between top of insulation and underside of concrete roof tiles. - Concrete roof tiles – model as flat continuous sheet, 20mm thick, (k~0.55 W.m-1.K-1) 

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