... 36 inches3.Standard depths of 3, 4, 5, and 6 inches4.Standard lengths of 10, 12, 20 and 24 ... feet5.Fixed rung spacing of 4 inch on center ... generating applications with short to intermediate support spans of 5 feet to 12 feet. Dimensions:Cable ... weight dimensions are all internal. ♣ Depth of 50mm, 100mm &150mm♣ Widths of 50mm, 100mm, 150mm, 200mm, 300mm, ...