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Decide how much of the

**stair step**that you want to cover. Say you want a 2-inch border. If you have a**step**that's 36 inches wide and 12 inches deep, to center your**stair tread**, you'd**measure**2 inches on the right and the left side and 2 inches on the top and the bottom.

Just so, how do you calculate stair treads?

**Steps**

- Measure the height, or "rise," of the space you want to make stairs.
- Subtract 6–7 feet (1.8–2.1 m) from the total rise to account for headroom.
- Divide the rise by 6 or 7 inches (15 or 18 cm) to find the total number of stairs.
- Divide the rise by the number of stairs to find the individual stair rise.

**Stair**riser heights shall be 7 inches (178 mm) maximum and 4 inches (102 mm) minimum.

**Stair tread**depths shall be 11 inches (279 mm) minimum. The riser height shall be measured vertically between the leading edges of adjacent

**treads**.

Also asked, what is rise and run of stairs?

A **stair rise** is the vertical distance from the top of one tread to the top of the next tread. The total **run** is the overall horizontal distance traveled by the stringer. The total **rise** is a **stairway's** overall change in height, from the landing pad to the top of the deck's decking.

It depends. Yes, the **stringers need** to be **supported** along their length, but they can span a few feet too, depending on 1) the width of the **stairs**, 2) the number of **stringers**, and 3) size of riser board. Then, the riser board is fastened to each **stringer**.