| 摘要 |
<p>PANEL FOR A GRID CEILING A panel for a grid ceiling in which a first panel member 10 is provided with slots 20 and, between the closed ends 25 of these slots and the webs 14 of the flanges, with apertures 34. Second panel members 12 have cooperating slots 50 with inturned lugs 48,50 which engage in the aperture 34 to rigidify the cross-over points adjacent the webs 144 Further lugs 56, 58 on the first panel may engage in openings 50 in the second panel members.</p> |
