| 摘要 |
A process for manufacturing a folding attic stairway comprising preparing a rectangular outer mounting frame 2 for mounting in a ceiling open and an associated inner stairway carrying frame 12 which is pivotally mounted by a hinge 13 on the outer frame 2. Side beams 14, on the inner frame 12 are spaced a preset distance inwardly of associated side members 6, 7 on the outer frame 2. A folding support arm 19 is mounted between each side beam 14, and the associated side member 6, 7 on the outer frame 2. A collapsible ladder 30 is then mounted on the inner frame 12 and is foldable between a collapsed stored position for nesting within the outer frame and an extended in-use position. |
