1100mm minimum.
usually 36" to top of rail. To be safe check w/ building dept.
36" O.K. However check with your city or county build Dept. as some code requires the height to be in between 32" and 34". It may be different for a balcony or deck hand rail and a stair rail but for...
Thirty six inches.
Between 910mm and 1m depending on which country you are in and what type of handrail i.e. scaffold or permanent
34 to 35" to the center of the pipe if horz.