Parts List and Exploded View for Truss Kit C36-104 Aluminum Lighting Truss. 4 Chord Box Truss. 20’x20′ by edt exhibit and display truss and lds light design systems. This Aluminum Truss Kit is a version of the C21-104 except the C36-104 has a truss beam running down the middle for extra durability and the ability to hang lights and truss accessories.