Mount where you need permanent access at crossover points. The upper platform features removable 2-sided 42-5/8" high-handrail with 21" mid-rail and fixed 4" toe boards to prevent objects from rolling off. Platform size is 23-9/16". Serrated steps for extra grip and safety are 23-9/16" W with a step spacing of 12". Ground legs include floor mounting pads. Units must be anchored to the floor. Units are all steel construction and can be knockdown for storage and shipping. Uniform capacity is 500 lb. Meets OSHA 29 CFR 1910.27. Baked-in powder-coated toughness.