STAIRS - OSHA RequirementsTreadPlatformRiser22in(56cm)Door SwingDoorStairsMinimum Width 22in (56cm)Minimum Depth 9.5in (24cm)Maximum Height 9.5in (24cm)Ladders60° - 90°Alternating Tread-Type Stairs50° - 70°Ship Stairs50° - 70°Standard Stairs30° - 50°Ramps~30°NosingStraight Leading EdgesNosingRiserTread