1,size: 290*290mm spigot truss 2,max span:16mm, max laod: 800kg 3.main tube:50 ... 16 hardnessMax load800kgMax span16mMain tube50*3.0mm/50*2.0mm/50*4.0mmBrace tube25*2.0mmStyle of jointSpigot or screw*Load-bearing ... more easy to lift and hang light2. .Giving the truss system you wanna, length, width, height, if give the weight ... to visit factory any time in Guangzhou 290mm truss system for concert