roof truss system 1.high load capacity 2.TUV ISO 3.easy to install,stock 4.non-rust,recycle ... diameter*thickness):25mm*2mmdiagonal tube(diameter*thickness):25mm*2mm(4)400*500 ,400*600 ,470*470,500* ... to set up and remove,transport and stock.4.16 degree high hardness,strong structure.Widely usage ... etc. The truss lift tower Accessories of truss system Our company main products:aluminum truss,bolts truss, ...