| 摘要 |
A structural member having a top flange, a web and a bottom support. The top flange transitions into the web and the web transitions into the bottom support. The overall height of the structural member varies to accommodate structural panels, including insulation and acoustical panels, of similar or different thicknesses. In one preferred embodiment, an apparatus having a plurality of structural members attached to corresponding bearing plates is used as a sub-purlin to provide an economical roofing system which allows for retrofitting and easy detection and replacement of damaged roofing panels.
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