| 摘要 |
<p>A box section beam having flanges (1 and 2) separated by webs (3 and 4) typically formed by cold rolling or folding from sheet steel is strengthened by incorporating sheet metal reinforcing members (8 and 9) in the flanges during the rolling or folding process. The reinforcing members typically extend part way along the webs so as to reinforce the corners (10), and are secured to the webs by fasteners (12). The beam can be optimally designed for its intended use by selection of the thickness and grade of the sheet metal reinforcing members (8 and 9).</p> |
