Lighting truss is commonly fabricated from 2, 3 or 4 aluminium tubes, also known as chords. Two Chord Light truss is referred to as Ladder Truss, Three Chord Truss are often referred to as Triangle Truss and Fou Chords would be a Box Truss. There a different rypes of connectios available on the market that offer a wide variety of different strenghts and load ratings.