| 摘要 |
<p>A beam for a panel suspended ceiling made from longitudinally folded metal strip, having a single-layered vertical web, and opposing horizontal flanges at the bottom of the web. The beam has a seam that binds the flanges of the beam together along the web to cantilever both flanges from the web, so that the beam is balanced, and the load from the panels supported on the flanges of the beam passes through the plane of the web. A cap covers the bottom of the flanges.</p> |
