S-6 Specifications (Dimensions in inches, weight in pounds) Width, overall 21 1/2 Length, overall 49 Height, overall 71 1/2 Height, top step 50 Average max, eye level 110 Shelf, top 21 x 37 Shelf, center 21 x 37 Shelf, bottom 21 x 45 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 81 Shipping weight (estimated) 91 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.