This Planning Advisory Notice (PAN) is intended to convey information on some of the design considerations for antenna supporting structures (structures).

The ANSI/ TIA-222 Standard as adopted by the International Building Code is titled “Structural Standard for Antenna Supporting Structures.” The key reason these structures exist is to support the network infrastructure deployed upon them. While there are various reasons as to why a structural engineer may assess a “failing” capacity ratio (i.e., the proposed load exceeds what the code allows for a design event), this PAN will focus on two primary categories of failures: 1. Structural Failure 2. Network Performance Impacts

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