| 摘要 |
A reinforced board, such as a floor joist, band joist, or ceiling joist that, in various embodiments, comprises: (1) a centrally disposed reinforcing member (e.g., a steel reinforcing member having a substantially Z-shaped or U-shaped cross section); and (2) a plurality of lengths of material (e.g., plastic) that are substantially in the form of a rectangular prism. In particular embodiments, the plurality of lengths of material are positioned and attached circumferentially around the reinforcing member so that the resulting structure has a substantially solid, substantially rectangular cross section.
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