Ladder
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United States of America Patent
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May 30, 2017
Grant Date -
Jul 31, 2014
app pub date -
Aug 24, 2012
filing date -
Aug 29, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A ladder including a first stringer and a second stringer spaced transverse from each other is provided. Each of the first and second stringers defines a channel and includes a plurality of crosspieces disposed in the channels of the first and second stringers. A plurality of rungs are spaced along and coupled between the first and second stringers. Each of the rungs has a horizontal portion and a vertical portion extending from the first stringer to the second stringer. A plurality of ribs are spaced along and coupled between the horizontal and vertical portions of the rungs.
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