| 摘要 |
A header arrangement has an elongated, lower, and substantially horizontal flange with a downwardly open U-shape for embracing a wall structured along at least part of the length of the lower flange, an elongated, and substantially vertical web connected along and extending upwardly from the lower flange, and an elongated, upper, and substantially horizontal flange connect ed along an upper edge of the vertical web and also having a U-shape. Web stiffeners and end stiffeners are engaged to the flanges and web to brace th e header arrangement against static and dynamic loads.
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