S-5-1 Specifications (Dimensions in inches, weight in pounds) Width, overall 20 Length, overall 45 Height, overall 71 1/2 Height, top step 50 Average max, eye level 110 Shelf, top 19 1/2 x 31 1/2 Shelf, center 19 1/2 x 31 1/2 Shelf, bottom 19 1/2 x 39 1/2 Flange clearance, top 13 1/2 Flange clearance, bottom 13 1/2 Height, top shelf 38 Steps 4 3/4 x 17 Step, top step only - Net weight 75 Shipping weight (estimated) 85 Load capacity, load at rest 500 List Price (Call for dealer information) Pricing (any shelf capable of bearing total load capacity) Material-satin-finish aluminum, 1/8" sheet and 3/4" IPS pipe. Casters-5", corner-mounted, 2 fixed, 2 swivel on ladder end.