| 摘要 |
A support bar, and method of its manufacture, for suspending grid members of a suspended ceiling, the bar being formed of a length of a sheet metal strip, a lower portion of the bar having regularly spaced holes for receiving and supporting bulbs of grid runners, an upper portion of the bars having longitudinally extending formed ribs, the ribs extending laterally from both sides of a central plane in which the lower portion lies. |
