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L = 16" ( 14" for 22.5" wide models)
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Step size (Inside of the ladder)
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Rise, distance, between steps
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1-1/2" (1")thick panel, 1-1/4" (3/4")polystyrene insulation, solid wood edging, 1/8" white MDF panels on both
sides,
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Cover door insulation value
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R=7 - 1.5" thick door
R=5 - 1" thick door
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*Clear opening
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(C) - 5", rough opening width minus 5"
(D) - 11", rough opening length minus 11"
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