As of December 17, 2019, OSHA 1910.25 defines the acceptable angle of incline for fixed stairs, ladders and ramps. Among other things, 1910.25 also defines acceptable tread depth, riser height, landings, doorway and gate swings, handrails, vertical clearance, and anticipated live load rating.  The focus of this article will be angle of incline for fixed stairs, ladders and ramps, but a few other points unrelated to angle of incline will be included.