... metal and nonmetallic materials.2.Standard widths of 6, 12, 18, 24, 30, 36 inches3.Standard depths ... 5, and 6 inches4.Standard lengths of 10, 12, 20 and 24 feet5.Fixed rung spacing of ... short to intermediate support spans of 5 feet to 12 feet. Dimensions:Cable Tray weight dimensions are all ... Q235 Steel (Chinese standard steel), SS304, SS316 & SS316L,FRP or GRP,Aluminium alloy • Electro zinc plated- for ...