Stair Tread Size Calculation Formula is as follows:

1, Tread Height Calculation:

Formula: Tread Height=Total Height/Number of Steps.

Explanation: the tread height is the height of each step of the stairs, usually in centimeters. The total height is the height of the staircase from the first floor to the top floor, including the step difference (if any). The number of steps is the number of steps in the entire staircase. Therefore, by dividing the total height by the number of treads, you can calculate the height of each step, i.e. the tread height.

2. Calculation of tread width:

Formula: tread width = stair width / number of steps.

Explanation: the width of the tread is the width of each step. The width of the staircase is the clear width of the staircase, excluding the width of the walls on either side. By dividing the width of the staircase by the number of steps, you can find the width of each step, i.e. the tread width.

3, stair slope calculation:

Formula: stair slope = (step height / step width) × 100%.

Explanation: the slope of the stairs is the inclination of the stairs, usually expressed as a percentage. This formula is used to calculate the slope of a staircase by dividing the tread height by the tread width and multiplying by 100%.

Precautions for calculating stair tread size:

1. Determine the use of the staircase and the applicable population: Different uses and use of the population of the staircase have different requirements, for example, the frequency of use and the load requirements of the residential staircase and the commercial staircase are different. Therefore, when calculating the size of stair treads, you need to consider the use of the stairs and the applicable population to ensure the safety and comfort of the stairs.

2, consider walking comfort: when calculating the size of the stair treads, you need to consider walking comfort. Tread height and width should be moderate, not too high or too low, so as not to affect the walking comfort. Generally speaking, the height of the tread is more comfortable between 15-18 centimeters, and the width of the tread is more appropriate between 22-27 centimeters.

3, make sure the slope of the stairs is appropriate: the slope of the stairs determines the inclination of the stairs. When calculating the size of stair treads, you need to consider the slope of the stairs to ensure the safety and comfort of the stairs. Generally speaking, the slope of the stairs is more appropriate between 26-45 degrees, and should not exceed 45 degrees, so as not to affect the safety of walking.

4, follow the specification requirements: in calculating the size of the stair treads, you need to follow the relevant specification requirements. For example, the "Building Stairs Code" and other national standards and industry standards for the design and construction of stairs have clear provisions and requirements. Following the code requirements can ensure the safety and reliability of the stairs.