What is a comfortable stair width?

In general public spaces a minimum of 44” (112 cm) must be met—providing ample space for one person and allowing the tight passage of two people. Comfortable two person stair widths range between 49” (125 cm) to 60” (152 cm). For three simultaneous users, a minimum of 74” (188 cm) is recommended.

What is the minimum staircase width?

(1) Stairways serving an occupant load of more than 50 shall be not less in width than 44 inches. Stairways serving an occupant load of 50 or less may be 36 inches wide.

What is the standard stair rise and run measurements?

Rule one says that rise plus run ( r+R) should equal 18 inches. Why? That’s what most people find to be a comfortable stride on most stairs. You can cheat a bit up or down, but below 17″ and more than 19″ will result in steps that require strides either too big or too small for most people.

What is the average rise and run of stairs?

The general rule (in the US) is 7-11 (a 7 inch rise and 11 inch run) (17.78cm-27.94cm). More exactly, no more than 7 3/4 inches (19.7cm) for the riser (vertical) and a minimum of 10 inches (25.4cm) for the tread (horizontal or step). You can find some more information here as well on other stair-related dimensions.

How to calculate tread and rise for stairs?

Tread and Rise Calculation Staircase Calculation Formula is Total Required Number of Risers = Total Stair Rise / Height of One Rise = 60″ / 6″ = 10 Riser Total Required Number of Tread = Total Stair Tread or Run/ width of one Tread = 90″ / 10″ = 9 Tread.

What is the formula for rise over run?

The slope formula is sometimes called “rise over run.”. The simple way to think of the formula is: M=rise/run. M stands for slope. Your goal is to find the change in the height of the line over the horizontal distance of the line.