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Cages: Cages are optional for fixed ladders with a floor to floor elevation of less than 20' (6100 mm). They are often available for ladders with elevation changes down to 11' (3350 mm). Cages are mandated to begin between 7' and 8'(2250 mm) from the ground and extend the entire length of the ladder.
If they are between 4 and 15 steps they will often be configured to have a top platform (on what would be the final step), and will have surrounding handrails – this style of safety step can be used at a maximum working height of 5 metres.
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.
Step ladders have flat steps and a hinged back. Swim ladder, a ladder used by swimmers to get out of the water, often on boats. Telescoping ladder, commonly used to refer to a hybrid between a step ladder and an extension ladder with 360-degree hinges; has three parts and can be taken apart to form two step ladders; e.g. Little Giant.
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.
This page was last edited on 18 July 2020, at 11:41 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...