| 摘要 |
Stepladders having flat tread steps have a step extender fixed along the rear edge of the first step from the top of the ladder to increase the width of the step bearing surface and improve ladder safety. The extender comprises a flat tread portion and a depending brace portion. A minor section of a longitudinal edge of the extender overlaps the upper, rear edge of the ladder step which it serves to widen.
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