Professional Stage Rigging Tower for Concerts, Festivals, Weddings & Exhibitions Product Overview The Aluminum Ground Support Truss Lifting System is a heavy-duty, portable rigging solution engineered for professional event production. Built from high-grade aluminum box truss with a four-pillar base and manual chain hoist lifting mechanism, this system allows crews to safely raise and lower lighting rigs, LED screens, audio equipment, and stage banners to the required height