Parts list and exploded view for Aluminum Truss Systems B21_124. 10×20 Trade Show Booths. Made with 4 Chord Box Truss by edt exhibit and display truss and lds light design systems. dont buy used aluminum truss or aluminum truss rentals, instead browse our wide range of aluminum truss for sale. Our aluminum truss price ensures long lasting durable truss parts that can be constantly configured into truss trade show displays