"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. Material Type Steel, Degree of Angle 56, Step Depth in. 10 1/2 excluding top step, Steps qty. 20, Portable or Stationary Stationary, Rail Height in. 144, OSHA Approved Yes, Base Size W x D in. 23 1/2 x 101 1/8, Finish Type Yellow powder-coat, Safety Chain Included Yes 2, Step Type Steel steps w/raised surfaces, Step Width in. 9 1/8, Top Step Height in. 143 3/4, Dimensions L x W x H in. 101 1/8 x 23 1/2 x 185 7/8, Top Width in. 23 1/2. 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"