Quad Truss. 3 Way Corner. Allows Connection of Supporting Leg. Made from AluminiumSquare Size: 290 x 290mm Tube Size: 50mm Length: 0.5m Weight: 9kg. Three way corner piece for the Quatro aluminium trussing system. This is common piece to use when assembling structures- allowing a supporting leg to be dropped below a corner.. trussing-trussing corner