"Vestil's Alternating-Tread Stair design offers a shorter span than traditional steps for a safe, space-saving set of stairs you can use almost anywhere. Designed for safety, with a handrail on each side of the unit and dual safety chain at the top. Welded steel construction with bolt-on handrails. U.S.A. Dimensions L x W x H in. 24 x 63 x 186, Finish Type Powder-coat, Material Type Steel, Degree of Angle 56, Step Depth in. 10 1/2 excluding top step, Step Type Alternating tread, Step Width in. 10 1/2 excluding top step, Steps qty. 20, Portable or Stationary Stationary, Rail Height in. 144, Top Step Height in. 144, Top Width in. 56 step angle, OSHA Approved Yes. Sturdy welded steel construction handles up to 350-lb. uniform capacity Formed steel steps with raised surfaces to provide better traction Durable, powder-coated yellow safety finish Top step measures 11-ft. high Ships knockdown, some assembly required"