Figure 17. Examples of Edge Protection and Handrail Extensions.
Four types of edge protection and handrail design are shown. The first ramp (top) labeled "Curb" shows a handrail horizontal projection of 12 inches (305 mm) minimum at the top and bottom of the ramp. The horizontal projection begins at the point were the sloped ramp surface stops. Edge protection on both sides of the ramp is a raised surface at least 2 inches (50 mm) high. A minimum clear width of 36 inches (915 mm) is provided between handrails and the edge protection. A lower railing is shown parallel to the ramp mounted no higher than 27 inches (685 mm) above the ramp.
The second ramp (second from top) labeled "Wall" shows a railing mounted on a solid wall. The handrails on both sides have horizontal projections as above. A minimum of 36 inches (915 mm) is provided between handrails.
The third ramp (third from top) labeled "Vertical Guard Rail" has a series of vertical guard rails or pickets. The top of the handrail is shown as 34 - 38 inches (865 mm - 965 mm) above the ramp and landings (applies to all handrails on accessible ramps). A minimum of 36 inches (915 mm) is provided between handrails.
The fourth ramp (fourth from top) labeled "Railing with Extended Platform" shows a railing without edge protection on the ramp surface. The ramp surface extends a minimum of 12 inches (305 mm) to the side of the handrail. The handrail detail is the same as the first example with a bottom rail no more than 27 inches (305 mm) above the ramp and landings. A minimum of 36 inches (915 mm) is provided between handrails.