Section 15.0 - Existing Structures

ID #1108

Section 15.5 indicated "A feasibility report shall state that final acceptance of changed conditions shall be based upon a rigorous structural analysis". I would like to confirm my interpretation regards this section. Is it mean for any equipment upgrade on the tower, a rigorous analysis is required? If the rigorous analysis is required, then the reactions comparison for foundation capacity is not enough? A site-specific geotechnical and foundation data are required? A lot of the clients are questioning why a rigorous analysis is needed for anybody to go on the tower. Why the reactions comparison is not adequate?

Question: Section 15.5 indicated "A feasibility report shall state that final acceptance of changed conditions shall be based upon a rigorous structural analysis". I would like to confirm my interpretation regards this section. Is it mean for any equipment upgrade on the tower, a rigorous analysis is required? If the rigorous analysis is required, then the reactions comparison for foundation capacity is not enough? A site-specific geotechnical and foundation data are required? A lot of the clients are questioning why a rigorous analysis is needed for anybody to go on the tower. Why the reactions comparison is not adequate? Response: A rigorous structural analysis is only required for significant changes as defined in Section 15.4. When foundation details are missing, associated assumptions must be documented along with the results of a rigorous structural analysis in accordance with Section 15.5.2. It is not within the scope of the Standard to determine the significance of the assumptions made for a rigorous analysis for a specific structure.

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Last update: 2014-01-06 21:48
Author: John Erichsen
Revision: 1.1

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