The height is measured vertically from the line connecting the nosing.
Wall mounted residential stair handrail height code.
As for guards along a set of stairs that serve as a handrail as well they are allowed to be at a height of no less than 34 inches but no more than 38 inches.
The way this is measured is to begin at the leading edge of the stair nosing and run an imaginary vertical line upward until it reaches the top of the railing.
If they are placed up against a wall they should have a clearance from the wall not less than 1 inches.
All railings built for non individual residential dwellings are built to an installed height of at least 42.
Stair handrail height as for their height they can be placed within 34 to 38 inches and shall be provided on at least one side of a flight of stairs having four for more risers.
Handrail height on the stairs should be no less than 34 inches and no greater than 38 inches.
Handrail height is the height of the handrail in relation to the stairs.
Required guards shall not have openings that allow passage of a sphere 4 in diameter.
Codes require railings against a wall to be between 30 inches and 38 inches high while handrails on open stairs must be 34 to 38 inches high.