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Know the maximum allowed riser height to determine the rise and run of stairs. For a standard straight run of stairs in a residence, the maximum stair riser height is 7 3/4 inches, and the minimum tread depth is 10 inches. The risers is the vertical part of a step, and a tread is the horizontal part that you walk on. To calculate how many risers are needed, measure the floor-to-floor height in inches, then divide the height by 7 3/4. The result will likely be a fraction, so always round up.
Going - the going of a flight of stairs is the horizontal distance. between the face of the first and last risers. The individual. going of a step is measured from face of riser to face of riser. and for domestic use should be a minimum of 220mm. Newel - accommodates the strings, handrails and treads/risers. of stairs. Nosing - the edge of the tread projecting beyond the face of. the riser and the face of a cut string.