Cute Young Brunette Girl On Stairs In An Old Building

• The tread depth is measured from the edge of the nosing to the vertical riser.
• The going is measured from the edge of the nosing to the edge of nosing in plan view. A person using the stairs would move this distance forward with each step they take.
• The total run or total going of the stairs is the horizontal distance from the first riser to the last riser. It is often not simply the sum of the individual tread lengths due to the nosing overlapping between treads.
• The total rise of the stairs is the height between floors (or landings) that the flight of stairs is spanning.