![Staircase Tread Properties & Design Capacities 1 Staircase Tread Properties Design Capacities](https://excel.civilmdc.com/wp-content/uploads/2021/12/Staircase-Tread-Properties-Design-Capacities.png)
Staircase treads measure between 8 and 10 inches long, with longer treads being used on larger staircases. Nine-inch stair treads are the most common lengths. To determine the length you need, simply measure from the back of the step to the front of the step.
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