uninterrupted constant thickness insulation systems) can be installed in series with the metal building systems described in this paper, and the effective thermal resistance can be determined by adding the thermal resistance values of the two systems.
Determine the effective thermal resistance for the metal building systems currently included in Standard 90.
20 cm), the space above the purlins if a standing seam roof is used, and the option to offset the liner below the bottom purlin flange as much as needed to achieve the desired insulation depth and effective thermal resistance without compressing the insulation.
Their models allow a designer or installer to determine the effective thermal resistance for any purlin spacing.
purlin spacings reduce the effective thermal resistance by approximately 10% and 25%, respectively, compared to 60 in.
h] represent effective thermal resistances for three thermal pulses.
y] = effective thermal resistances for the yearly thermal pulse, m*K/W (h*ft*[degrees]F/Btu)
m] = effective thermal resistances for the one month pulse, m*K/W (h*ft*[degrees]F/Btu)
h] = effective thermal resistances for the hourly thermal pulse, m*K/W (h*ft*[degrees]F/Btu)