| 摘要 |
A fixed ladder has a first plurality of parallel rungs arranged along a low er section thereof and also has a walk-through section with vertical side rails arranged at the top thereof. The improvement of the present invention is the provision o f a second plurality of parallel rungs arranged along the flared walk-through section. This second plurality of rungs is attached at one end to the vertical side rails of the walk- through section and is easier to hold than the vertical side rails if a foot or a climber slips near the top of the ladder while mounting or dismounting at the walk- through section.
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