handles are rails designed to be grasped by hand to provide stability or support. Handrails are usually used when going up or down stairs and escalators to prevent water from falling. Handrails are usually supported by the post or installed directly to the wall.
Similar items not covered in this article include bathroom handrails - which help prevent falling on slippery floors and other wastebaskets, are used, for example, in galai ships, and barres, which serve as training aids for ballet dancers. Keep rails and ledges ladder and other dangerous areas, keep people and vehicles away.
Video Handrail
History of the handle
The oldest handrail known to be discovered by French archaeologist Pierre St Jamaine in an Assyrian ruins in southern Iraq in the city of Nippur.
Maps Handrail
English Specifications
The English Standard and the Standard English Practice Code are aligned with the Normal Europe series (EN). The handle height is set between 0.9 and 1 meter. More information can be found on the UK government website.
Dimensions of handrails (AS)
Code codes - The International Code Council (ICC) and the National Fire Protection Association (NFPA) - and accessibility standards - ANSI A117.1 and America with Disabilities Act Standards for Accessible Design (ADASAD) - refer to the handling dimensions. The current version of this code and standard now agrees that the handle is defined as one circular cross section with an outer diameter of at least 1¼¼¼ (32 mm) and a maximum of 2 "(51Ã, mm) or a non-circular cross section with a minimum perimeter dimension of 4" (100 mm) and a maximum of 6 "(160 mm) and a cross-sectional dimension of 2" (57 mm) In addition, the International Housing Code (IRC) includes the definition of "Type II" handles which allow grips with perimeter dimensions greater than 6 ¼ ¼ (160 mm).
IRC and residential parts of IBC 2009 determine the Type II handles as follows:
Type II. Handrails with perimeters larger than 6 ¼ inches (160 mm) should provide a gripping area of ​​the fingers that can be gripped on both sides of the profile. The index finger will start within 3/4 inch (19 mm) measured vertically from the highest part of the profile and reach a depth of at least 5/16 inches (8 mm) in 7/8 inches (22 mm) below the widest part of the profile. This required depth will continue for at least 3/8 inch (10mm) to a level not less than 1 Ã,   inch (45 mm) below the highest part of the profile. The minimum width of the handrail above the recess should be 1 ¼ inch (32 mm) to a maximum of 2¾¾ inches (70 mm). The border must have a minimum radius of 0.01 inches (0.25 mm).
The handrails are located at altitudes between 34 "(864 mm) and 38" (965 mm). In areas where children are the primary users of buildings or facilities, ADASAD 2010 recommends that a second set of handrails at a maximum height of 28 "(711 mm) measured to the top of the gripping surface of the ramp surface or the nosing ladder can help prevent accidents.
The 1992 United States With Disabilities Act Accessibility Guidelines (ADAAG) states that there is an absolute dimension of 1 ½ "between the handle and the wall.This is actually the dimension of the" grab bar "which is part of the ANSI 1986 ANSI A117.1 ANSI turns the notation to 1Ã,Â" in 1990. This was not corrected in 2010 with the approval of the new ADASAD which now requires a minimum permit of 1Ã,½ "(38 mm).
The codes in general also require that there is a distance between 1 the½ between the bottom of the handle and any obstructions - including the horizontal bracket sleeve. However there is a looseness for variations in hand size - for every 1/2 "additional perimeter Dimensions above 4", 1/8 "can be deducted from the permit requirements.
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Strength handle (AS)
Handrails to support continuous load 50 plf (75 kg-m) or a concentrated load of 200 pounds applied at the top of the handle (90 kg).
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The handle handle ADA
Adult height requirement
The top of the handrail handle should be at least 34 inches (865 mm) and 38 inches (965 mm) vertically above the walking surface, nosing ladder, and ramp surface. Handrails should be at a consistent height above the walking surface, nosing stairs, and ramp surfaces.
Children's high recommendation
When children are the primary users in a building or facility (eg, primary school), a second set of handles at the appropriate height can help them and help prevent accidents. The maximum height of 28 inches (710 mm) measured to the top of the gripping surface of the ramp surface or the nosing ladder is recommended for handrails designed for children. Sufficient vertical distance between the top and bottom grips, at least 9 inches (230 mm), should be provided to help prevent the trap.
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See also
- Baluster
- Fence rail
- Hanglord
- Mobile Security Steps
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References
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External links
Source of the article : Wikipedia
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