Section 15.0 - Existing Structures

ID #1154

I am a commercial building reviewer for the City of San Antonio. My question is related to cell tower collocations. San Antonio requires that a building permit is secured before the work is started. See below for complete question

I am a commercial building reviewer for the City of San Antonio. My question is related to cell tower collocations. San Antonio requires that a building permit is secured before the work is started. Typically, the applicant submits a structural analysis of the existing cell tower using TIA 222- Rev G as the standard. We recently had an engineer prepare a structural analysis report for the replacement of antennas on an existing cell tower using TIA 222-F as the standard. He has stated that conformance to 3108.1 of the 2012 IBC and TIA 222-G is not required. Can you please advise? RESPONSE: Per Section 15.4 Revision F may be used to determine if there is a significant change in loading for Class I and II structures in which case the required modifications must be determined in accordance with TIA-222-G. A Revision F analysis may be used for demonstrating conformance to TIA-222-G when the changed condition is not significant (increase in strength requirements ≤ 5%).

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Last update: 2015-02-03 18:00
Author: John Erichsen
Revision: 1.1

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