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Joint Photographic Experts Group Image  |  2005-02-15  |  54KB  |  680x510  |  16-bit (3,550 colors)
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OCR: Thermal Performance R-values 2000 1800 1600 1400 1200 Aluminum 1000 Steel 800 Concrete Wood 600 400 200 Aluminum Steel Concrete Wood 250 2000 Source Wood Handbook: Wood as an Engineer inc Material, Aqriculture Handbool USDA Forest Service 1987 Wood natural nsulator and aluminum natural conductor the R-value aluminum R-value wood 2000. reduce heat flow through aluminum frames mal anufacturers add some type thermal break as shown on the slide Therma erformance Agriculture insulator manufacturers showr