the standard models is as follows, and can design and make by your requirement also:
1 Aluminium truss : ladder truss, triangle truss, box truss ( square truss ),length on 0.5m0.5m / 1m 1.5m / 2m / 2.5m / 3m / 3.5m / 4m,aluminium type T6 , main pipe D=50mm and thickness=3mm
1)exhibition truss: 100mm*100mm / 150mm*150mm / 200mm*200mm / 250mm*250mm
2)stage truss: 287mm*287mm/ 290mm*290mm/ 300mm*300mm / 350mm*350mm / 400mm*400mm / 450mm*450mm
3)he***y duty truss: 500mm*500mm / 500mm*600mm / 520mm*760mm / 600mm*760mm / 760mm*910mm