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What is the minimum length padder that a worker needs to access a landing nine feet above the adjacent floor

What is the minimum length padder that a worker needs to access a landing nine feet above the adjacent floor class=

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inuhoseki

I would assume 12, since it is 9 feet above the adjacent floor, and strictly 9 feet would cause the ladder to be extremely unstable, because it would just be clinging to the landing. I personally like to have the feeling that my ladders are stable, so 12 would be your best bet

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