The number of handrails required depends on the width of the stairway as prescribed under 1910.23(d). Specifically, if the stairway is less than 44 inches wide and only one side is enclosed, a handrail is needed only on the open side. However, if the stairway is more than 44 inches wide, but less than 88 inches, a handrail is needed on both sides. If the stairway is more than 88 inches, a handrail is also needed on the enclosed side and a stair railing must be located in the middle of the stairs.