Front View Dimensions for A40-103 Truss Arch System DJ Truss. Standard Arch by lds light design systems and edt exhibit and display truss. This truss system is perfectly suited for banner displays. This truss system can also be used for truss lighting and a dj booth backdrop or archway. Triangle truss nests together while packing. make it cost effective to ship and transport to any venue. This truss arch system is also ideal for mobile applications.