The International Sign Association has released the results of a three-year study it commissioned on single-pole sign structures. The new report enhances the understanding of sporadic failures of single-pole, high-rise sign structures that incorporate “telescoping poles.”
Fatigue Tests of Welded Connections in Cantilevered Steel Sign Structures is based on tests conducted at the University of California, San Diego’s Charles Lee Powell Structural Systems Laboratory from 2010-2011. The research provides guidance in the repair or rebuilding of existing structures as well as information about improving the safety and durability of new structures.
“This research has been an important initiative for ISA on behalf of our industry and is the result of many hours of work by the ISA Mechanical and Structural Subcommittee,” said Rich Gottwald, ISA’s executive vice president. “While there have been only a handful of failures out of out of tens of thousands of sign structures, ensuring that our products are safe throughout their life-cycle is important for our industry and our customers. We believe that this report will help engineers, manufacturers, installers, and end users understand the importance of regular inspections and continuing education.”
The full report is available at the ISA Web site.