Does the ramp have to be a certain angle to be compliant?

According to the latest interpretation from the OSHA Review Commission, if a worker can walk upright to the top of the ramp without holding onto anything, it will pass, even if walking up the ramp is a little difficult. If the worker must scramble up the incline on this hands and feet, or grip anything to assist his ascent, the incline is too steep and must be improved.  "Occupational Health & Safety 21", October 15, 2007