The design of insulated metal roof panels that meet both the structural and hygrothermal performance requirements for a conditioned attic/roof system is presented. The two panel designs, referred to as the truss core and the stiffened plate, are fabricated from steel-web plates laser welded to steel face sheets and a separate, polyurethane foam insulating layer. The truss core includes an exterior (roof side) and interior (attic side) face sheet, whereas the stiffened plate includes only an interior face sheet. This presentation extends the work presented in a previous paper, which focused on design of the structural component of the panels, to the design of complete panel assemblies that include foam insulation and finish layers. Design for hygrothermal performance of the panels and architectural details for panel-to-panel, ridge, soffit, and gable end-wall joints are provided. Both panels offer options for conventional roof finishes as well as a metal finish. Use of the stiffened-plate panel is restricted to sites with lower wind and snow loads and is preferred for dry climates. The truss-core panel, which is lighter and capable of longer spans, is suitable for a wide range of climates and architectural styles.
|Original language||English (US)|
|Journal||Journal of Architectural Engineering|
|State||Published - Dec 1 2017|
Bibliographical noteFunding Information:
Financial support of this study was provided by the U.S. Department of Energy (DOE) under Award DE-FC26-04NT42114 and the University of Minnesota Initiative for Renewable Energy and the Environment and College of Science and Engineering. The opinions, findings, conclusions, or recommendations expressed herein are those of the authors and do not necessarily reflect the views of the DOE. The authors acknowledge the invaluable assistance of David H. MacDonald of Mattson MacDonald Young (Minneapolis, Minneapolis) on the evaluation of panel-to-panel connections; Mike Krupa, BASF on the identification of foam properties; and Larry Wrass of Pulte Home Sciences, who suggested that the team develop a panelized roof system.
© 2017 American Society of Civil Engineers.