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Minimum perpendicular clearance between fixed ladder rungs, cleats, and steps and any obstruction behind the ladder must be 7 inches; ... Step-across distance between the center of the steps or rungs of fixed ladders and the nearest; 8 9;
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www.osha.gov/Publications/osha3124.pdf
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OSHA is unclear but the distance should be 12". The first step on a ladder can vary between 6" and 18".
http://wiki.answers.com/Q/What_is_the_distance_between_...
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In combination with an extension ladder, an L-shaped bracket is provided. The bracket has at least one first leg longer than the distance between successive rungs of the ladder. The first leg is place ... The attachment 10 is mounted on a ladder 1 having side rails 2 and rungs 3 , 4 , and 5 . The attachment 10 has a long...
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www.freepatentsonline.com/6942063.html
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10. A crane comprising a boom, 11. The combination defined in claim 10 in which said extension ladder means is spaced above said boom and yoke means a distance at least the distance between two rungs of the collapsible ladder means.
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www.freepatentsonline.com/3710893.html
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chapter 49.24. HEALTH AND SAFETY -- UNDERGROUND WORKERS ... 49.24.260. Requirements as to caissons ... PEO7.com 23945 Calabasas Rd. Suite 106, Calabasas, CA 91302 818-222-4572 cs@peo7.com...
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www.peo7.com/lawfiles/peoWA_49.24.260.16259.htm
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An accessory for releasably securing to a ladder. The accessory has at least one stabilizing arm for stabilizing and supporting the ladder when leaned against a building or structure. ... Thisoff-set will effectively result in stabilizing arms 6 also forming an obtuse angle with ladder rungs 4 when secured therein.
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www.patentgenius.com/patent/6328130.html
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A stand-off brace for attachment to the top end of a ladder maintains the top end of the ladder away from the work surface against which it would ordinarily rest. The brace has a general U-shape wherein the legs are adjustable to vary the distance between the ladder and the work surface.
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www.patentgenius.com/patent/5113973.html
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This is in fact a measurement of the curvature of the Earth's sphere between Syene and Alexandria, and once distance ... In particular, we can no longer assume the Sun to be very far away in the sense that we did for the previous two rungs of our distance ladder (we essentially assumed the Sun to be infinitely far away).
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www.astro.washington.edu/larson/Astro101/labs/DistSun/a...
www.astro.washington.edu/larson/Astro101/labs/DistSun/astro101a01_rung1-3.html
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tp Rope Ladder (tp723)6 rungs, 2m long, made with durable smooth hardwood rungs. Fits the Sherwood Deck System and all wooden climbing frames stocked by Just Outdoor Toys. ... Dimensions: 2m (l) x 40cms (w); Distance between rungs: 25cms;
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www.justtptoys.co.uk/store/item/v912/Climbing/tp_Rope_L...
www.justtptoys.co.uk/store/item/v912/Climbing/tp_Rope_Ladder.html
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