3 feet
The ideal height is 33" with an acceptable range of 3". In other words it can be anywhere between 30" and 36" above the nose of the tread to the top of the rail. But if you want to be sure and be "legal" in your area, check with the local building inspector.
This would vary from jurisdiction to jurisdiction depending on local building codes, and cannot be answered wtih any generalized response.
42 inches
Standard minimum railing height is 36" from finished floor, according the the IRC 2003 building code.
14 ft
To comply with the Americans with Disabilities Act, certain requirements must be met in order for an area to be considered to be considered acceptable in terms of accessibility for people with disabilities. The required height for a handrail on a set of stairs is that the top of the handrail must be between 34 and 38 inches above the stair nosing.
Copy Where minimum corridor width is 6 ft (1.8 m), projections of maximum 6 in. (15.2 cm) from the corridor wall, above the handrail height, shall be permitted for the installation of hand-rub dispensing units in accordance with 18.3.2.7
According to "Joinery and Carpentry" by Richard Greenhalgh and others, which was current when I served my time between 1956-1961 (sorry the books are not dated) the recommended minimum height for stair handrails was between 2'7" and 2'9". We used the average of 2'8" or 34" I do not know if that was a fixed code requirement in those days.This measurement is taken vertically from the nose or the tread to the top of the handrail.See this sketch http://www.builderbill-diy-help.com/image-files/balustrade.gifModern codes such as the BCA where I live state that the minimum height should be 865mm which is 34" which as you can see, it has not changed at all.What has changed is the height of the Handrail or balustrade on the landings.In the BCA it is now 1050mm which is 41" or 3'5". In the 1950's and for a long time after it was 36" or 3'.CheersBill
The maximum height for a change in level without requiring a handrail varies form country to country and may also depend on the local authorities regulations.
No Minimum Height! :)
the minimum height can be from 1cm. to 1in.
what is a type B handrail
they have to be a minimum height of between 5'4" and 5'5"
The minimum height is the same as for all soldier entrants 148cm