Front view dimensions architectural information 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 truss system that can be broken down into small truss structures to meet trade show size requirements giving you a long lasting booth. 3 truss systems in one. dont settle for pop up trade show display or pop up trade show banner and instead purchase aluminum truss systems that will last from LDS light design systems