"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. 23 1/2 x 85 1/8, Top Width in. 23 1/2, Steps qty. 17, Top Step Height in. 131 3/4, Safety Chain Included Yes, Rail Height in. 173 7/8, Step Depth in. 10 1/2 excluding top step, OSHA Approved Yes, Dimensions L x W x H in. 85 1/8 x 23 1/2 x 162 1/4, Degree of Angle 56, Finish Type Yellow powder-coat, Step Width in. 9 1/8, Portable or Stationary Stationary, Step Type Alternating tread stair, Material Type Steel. 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"