Square truss, box truss, triangular truss; bolt truss, spigottruss, Spigot truss size as:220x220,289x289,300x300,389x389,400x400,520x520,500x600,520x520,520x760,670x670,760x600,1100x700;Bolttruss sizeas:200x220,250x250,300x300,300x400,350x350,400x400,450x450,500x500,500x600,520x760,760x600,1100x700,800x1000