What is the meaning of Harae? How popular is the baby name Harae? Learn the origin and popularity plus how to pronounce Harae
The minimum width of stairways is 36. Handrails may project into the required width a distance of 3 Â½ from each side of a stairway. Stringers and other projects such as trim and similar decorative features may project into the required width 1 Â½ on each side.
The building code requires a minimum of 5 feet, 2 inches because of the tread width minimum of 26 inches. If we add the width of two 26-inch steps, a center column and a handrail, we find that a 62-inch diameter is a minimum for any spiral staircase. I chose a 70-inch diameter to make the stairway easier to walk.he center column and two treads make a total diameter of 68 inches. The circumference of the stairway is the diameter in inches multiplied by 3.1416. So, 68 inches x 3.1416 = 210 inches (rounded to the nearest inch). Since we will make 14 steps, 210Ã·14=15 inches.