Figure 39(d) Handrail. Handrail is mounted into a recessed section of a wall. The bottom of the recessed section is not more than 3 inches wide where the handrail is located. The recessed section shown extends vertically approximately 6 inches and then angles to a point on the flush wall a minimum of 18 inches (455 mm) above the grab bar. This profile is provided to permit grasping from a standing position. Spacing between handrail and the adjacent wall shall be 1- 1/2 inches (38 mm). Handrail shall be 1-1/4 to 1-1/2 inches diameter (32 - 38 mm). Support for the handrail is from below.