The information regarding the dynamic response of lattice towers is currently scattered throughout the literature, making it difficult for the practicing engineer to obtain the information necessary for design purposes. This report is a compilation and clarification of current methodologies for the dynamic response of communication towers in a single source. Both self-supporting lattice towers and guyed lattice masts (guyed lattice towers) are included. Topics include dynamics of cables and towers, dynamic analysis, wind loads and response, seismic input and response, and vibration control. This report was prepared by the ASCE Task Committee on the Dynamic Response of Lattice Towers of the Technical Committee on Special Structures and the Technical Administrative Committee on Metals.