Aluminum I Beam lighting Ladder Truss is cheap price,and its loading capacity is CPL 26 kg and UDL 9kg at 6m span. This i Beam Lighting Truss is widely used in flat circular truss, rotary circle lighting trsus, backdrop, roof truss, audio, exhibit truss kits, theatre, event, concert, line array speaker, led screen, banner, tv, party, outdoor,ect.