downloadable cad render presentation image for Modular Exhibit Truss System C21_123. 20×20 Trade Show Perimeter Booth. 12″ wide Triangular Truss by edt exhibit and display truss and lds light design systems. modular aluminum truss trade show display design ideas that breaks down into smaller truss systems to meet trade show size standards. for large product displays. large space to be creative with. hang company banners and custom company banners