"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. Finish Type Yellow powder-coat, Step Width in. 9 1/8, OSHA Approved Yes, Top Step Height in. 156 1/4, Steps qty. 21, Dimensions L x W x H in. 109 5/8 x 23 1/2 x 198 1/2, Material Type Steel, Safety Chain Included Yes 2, Top Width in. 23 1/2, Step Depth in. 10 1/2 excluding top step, Base Size W x D in. 23 1/2 x 109 5/8, Degree of Angle 56, Step Type Steel steps w/raised surfaces. 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"