Truss For Line Array Towers aluminum truss AT-1AT-1 the line array speaker truss are specially used as a support of line array speakers .It is made of Aluminum Spigot Truss, Square 290mm*290mm/50*3mm/20*2mm and with a loading capacity of 600kg .And a maximum lifting height of 7m  ower Feature:Modular Design For Fast AssemblyEasy Transport6082-T6 Aluminum ConstructionAdjustable Leveling PadsTower Hinged For Easy LoadingWorks With Many Popular Array Designs Technical Specifications:Max. Overall height  7m(Other Heights optional)Max.lifting height7mMax.Loading capacity600kgMax surface load front  4m sqmMax.surface load side  2 sqm Max windspeed  20m/s