By their nature, stepladders have a stable angle and are self-supporting when properly used but offer very little opportunity to be secured from tipping. Therefore, the height limitation for such usage should be minimized, possibly to a maximum working height of 6 feet (or an 8-foot stepladder). Railed stepladders with depressible casters offer more opportunity for safe access to heights. These ladder stands should be replaced by elevating platforms to reduce training and observation burdens.
See “Introduction to Fall Protection, 4th Edition” page 126.
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