| 摘要 |
A floor panel to be used in an elevated floor assembly, includes a flat top sheet receptive to a tread surface and a drawn bottom plate secured to the top sheet. The bottom plate is formed to present a plurality of radial ribs that intersect one another centrally of the panel and extend to merge with peripheral ribs that edge the four sides of the panel. The sides of the ribs web the sheet and plate together to form hollow box sectioned beams as peripheral ribs and radial ribs of the panel. A cross-shaped stiffener with ridges is positioned between the sheet and the plate. The ridges are oriented to coextend with the radial ribs and the side edges of the stiffener are secured to the underside of the top sheet. A trim member is wedged between the edge of the sheet and the rim of the plate to abut the tread surface. The panel can be perforated to permit air circulation and the perforations do not cause any significant loss of structural strength. |
