I have an 18" wall (curb) that is the barrier between two areas. People will need access between these two areas. It would seem simple enough to just step over it. But does OSHA allow that? The only reference to height that I can find is that a 9.5" step is allowed. So, three steps would be sufficient for the wall + stair structure. But do I even need stairs at all? I can't find anything in IBC or OSHA.