| 摘要 |
<p>A wind-resistant sectional overhead door (21) selectively moveable between an open position and a closed position relative to a door opening defined by spaced vertical jambs (23, 24) and a horizontal header (25) extending therebetween including, a plurality of elongate horizontal panels (40-43) pivotally connected at the top and bottom edges (48, 49) of adjacent of the panels, roller tracks (31, 32) mounted on the vertical jambs to either side of the door, roller shafts (65) mounted at the ends of the panels, guide rollers (66) carried by the roller shafts and engaging the roller tracks, and restraining members (70, 170) for limiting axial movement of the roller shafts, whereby the roller shafts and the panels are tension-loaded when the door is in the closed position to prevent buckling of the panels under applied wind forces. The restraining members may be replaced by or supplemented with tension rod assemblies (225, 325). The performance of the door may be enhanced by utilizing header lock mechanisms (95, 395), beam assemblies (285), and bottom cleat assemblies (290).</p> |
