18“ x 12“ manufactured the same way as 12“ x 12“, but has an added advantage due to its width of 18“, of being able to accommodate 2 lighting bars back to back. The truss is also slightly stronger over longer spans. It is made from 6061T6 or 6082T6 alloy 2“ x 0.125“ tubes for the main chords and 1“ x 0.125“ tubes for the diagonals. The truss can be used with Ground Support System with suitable sleeve blocks.