Based on a triangular shape, a truss tower is a structure designed to support heavy loads. Steel truss towers provide the large majority of tower installs today. Many years ago wood truss towers saw common use but have since been surpassed by their steel counterparts. In this article, you will learn what a trussed tower is, trussed tower applications, and the differences between a trussed tower and a lattice framework. http://www.leadertruss.com/aluminum-truss/aluminum-lighting-truss/truss-tower.html