Square spigot truss 600*760MM 1)Good stability.lightweight 2)market price 3)6061- ... T6,6082-T6 two types material Square spigot truss 600*760MM truss system:good stability,light weight,6082/T6 materialmain ... ,389*389mm,400*400mm,450*450mm,500*500mm,520*760mm,600*760 mm and so on. Heavy-duty Square spigot truss ...