Cross 4-Way Heavy Duty Pro-30 Square G Truss. The Pro-30 Heavy Duty Truss offers excellent span and weight load characteristics and is well-equipped for use in medium to large applications. It is ideal for spans of up to 20 meters. Made from certified 48x3 mm thick aluminum alloy tubes with 16x2 mm braces. Each length features a durable construction with a diagonal twist lock. The Heavy Duty Truss is available in aluminum color or powder-coated in black, RAL9005. Both colors are also available as Prolyte-compatible F-beams or Global/Euro-beam-compatible G-beams. Since the spring bars are standardly designed in Pro-30 version, you can easily combine the Heavy Duty Truss with your current truss.