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An extension ladder. A ladder is a vertical or inclined set of rungs or steps commonly used for climbing or descending. There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top.
Fall protection system: Fixed ladders above 24' must have a fall protection system in accordance with OSHA Standard 1910.28(b)(9)(i)(C). Cages are not anymore considered as fall protection, and ladders that are newly installed or replaced after November 19, 2018, must have a fall protection system based on OSHA's new fixed ladder requirements.
Folding ladders are usually found in lengths between 8 and 16 feet (2.4 and 4.9 m), while the greatest length is usually 10 feet (3.0 m). These ladders must also have footpads attached to the butt end in order to prevent slipping on hard and soft surfaces.
This page was last edited on 13 January 2006, at 22:29 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
The ladders are made by threading and fixing a series of hardwood, machined steps, each not more than 400 mm × 115 mm × 25 mm (15.75 in × 4.53 in × 0.98 in), onto two pairs of minimum 18 mm (0.71 in) diameter manila ropes, and binding each step to the ropes at 310 mm (12 in) (+- 5 mm, 0.20 in) intervals.
The common height for turntable ladders did later go to 32 meters (100 feet), so that 30 meter is a common limit in some building regulations today, for example in Switzerland. Any building that exceeds the height of the usual turntable ladders in a city must install additional fire safety equipment, so that these high-rise buildings have a ...
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