Thermal resistance calculation
Thermal resistance of 60×160 timber rafters at 660 mm centres. Build-up: rafters with insulation between them, plasterboard below and roof boarding above λtimber = 0.17 W/[mK] Rtimber = 0.16 m/0.17 {W/[mK]} = […]
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Here the architect had not required the structural depth to be limited to the original floor thickness. This made spans of about 7.5 m possible with a cambered HEB240 beam, forming part of a new T-piece under the existing rear and side walls. In the front […]
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