Measuring from the completed stair rail brackets or an adjacent ramp slope, the height of stair joints should be 34-36 inches, according to IRC. The rails as a transition between flights go from the rails to the guard rails (egg on a landing) or start a flight may exceed this mandate. A whistleblowing, also known as a snake or boot relief, that goes over the minimum tread can be lower than these requirements. At least one handrail is needed on one side of a continuous staircase if it has four or more steps.
Stair height is measured at the top of the stair rail grip, which can vary in thickness. Type I rails with circular profiles need an outer diameter of 1.25-2 inches. If they are not round, their circumference must be 4-6.25 inches, with a maximum cross section of 2.25 inches. Edges must have a radius of at least 0.01 inches. Type II rails larger than 6.25 inches need a recessed area for finger grip. The recess must begin within 0.75 inches from the top of the profile and continue at least 1.75 inches below the highest profile. Edges must also have a radius of at least 0.01 inches.
A shot enclosure stairway brackets joins outside class level on a driveway, for example, to a finished lower level like a basement. It can ignore these height and size specifications if it meets the following requirements. The lower level must have another way to gain access to a higher level or end. The maximum height from the basement floor to the grade must be less than 8 meters. And the opening from class level to staircase must be covered with hinged doors or other approved methods.