Top step is 14"D. for additional comfort and safety. Exceeds OSHA and ANSI standards. CAL OSHA available. Unique 50 stairway slope for easy forward ascent or descent. Sturdy 450 lbs. capacity. 7"D intermediate steps. Easy operating lockstep secures ladder to the floor. Tread types available: Serrated Grating (G), Expanded Metal (X), Perforated Step , and Abrasive Mat . Gray Powder coat finish. See Related Items tab for available options. Not all options available on all part numbers.