Certified Playground Safety Inspector (CPSI) Practice Exam

Ramps with two rails are required to have a curb projecting above the ramp at both edges when barriers extend beyond the edge of the ramp. This is to ensure the safety of individuals using the ramp, as the curb helps prevent unintentional falls off the ramp caused by barriers protruding beyond the edge. The other options are incorrect because they do not address the specific condition mentioned in the question. While they may also play a role in the design requirements for ramps, they are not the primary reason for requiring curbs with two rails.