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Fixed ladders consist of the following components: Rungs: all fixed ladders have rungs, dictated by OSHA Standard 1910.27(b)(1) of no more than 12" (300 mm) on center (measured as the distance from the centerline of a rung to the center line of the next rung), and at 16" (410 mm) clear width.
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.
At a maximum interval of eight steps, the standard step is replaced by a spreader, which is an elongated version of the standard machined step, with a minimum length of 1.8 m (5 ft 11 in). The spreader's function is to prevent the ladder from twisting in the prevailing weather conditions when in use.
Maximum nosing protrusion, typically 1.25 inches (32 mm) to prevent people from tripping on the nosing. Height of the handrail. This is typically between 34 and 38 inches (864 and 965 mm), measured to the nose of the tread. The minimum height of the handrail for landings may be different and is typically 36 inches (914 mm). Handrail diameter.
Haiku Stairs. The Haʻikū Stairs, also known as the Stairway to Heaven or Haʻikū Ladder, is a steep, steel step structure that is currently being dismantled and removed. It provided pedestrian access to former U.S. Navy communication facilities on the island of Oʻahu, Hawaii [1] with more than 3,000 steps along O‘ahu's Ko'olau mountain ...
Scaffolding for rehabilitation in Madrid, Spain [1] Scaffolding, also called scaffold or staging, [2] is a temporary structure used to support a work crew and materials to aid in the construction, maintenance and repair of buildings, bridges and all other human-made structures. Scaffolds are widely used on site to get access to heights and ...
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