S-7 Specifications (Dimensions in inches, weight in pounds) Width, overall 21 1/2 Length, overall 49 Height, overall 78 Height, top step 60 Height, standing platform - Height, top shelf 38 Height, work tray 78-95 Average maximum eye level 120 Shelf, top 21 x 37 Work Tray 21 x 21 Standing Platform - Shelf, center 21 x 37 Shelf, bottom 21 x 45 Flange clearance (between shelves) 13 1/2 Steps 4 3/4 x 18 1/2 Net weight 95 Shipping weight (estimated) 105 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.