"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. Base Size W x D in. 24 x 110, Degree of Angle 56, Material Type Steel, Portable or Stationary Stationary, Step Depth in. 9 1/2 top step depth, Dimensions L x W x H in. 24 x 110 x 198, Finish Type Powder-coat, Steps qty. 21, Top Step Height in. 156, Top Width in. 56 step angle, Step Type Alternating tread, Step Width in. 10 1/2 excluding top step, 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 13-ft. high Ships knockdown, some assembly required"