A slider bracket assembly is provided having one or more slider brackets, one or more strap-slider brackets, a main cable tray, and a tray section, wherein the one or more slider brackets couple the one or more strap-slider brackets to both the main cable tray and the tray section. Methods for installing a slider bracket assembly comprise coupling slider brackets to a first strap-slider bracket and a second strap-slider bracket, coupling the first and second strap-slider brackets to a tray section to form a tray section assembly, and then coupling the tray assembly to a main cable tray using the first and second strap-slider brackets.