| 摘要 |
A thermally-improved metallic channel [50] having a web [60] with one or more flanges [62] extending at generally perpendicular angles therefrom. At least one of said flanges [62] incorporates an inwardly-bent depression [64]. This depression [64] forms contact ridges [66] that are used as bearing surfaces against which adjacent materials [56,58] may be affixed. These contact ridges [66] along with an air space [70] resulting from said inwardly-bent depression [64] serve to decrease the rate of heat loss or heat gain due to conductivity between said thermally-improved metallic channel [50] and adjacent materials [56,58].
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