Chapter
Sep 20, 2022
Electrical Transmission and Substation Structures 2022

Test Methods for Serviceability Assessment of Non-Traditional Steel Support Structures

Publication: Electrical Transmission and Substation Structures 2022: Innovating for Critical Global Infrastructure

ABSTRACT

On occasion, a transmission line might be terminated on, or supported by, the oddest of structures: to anchors in the face of cliff, to powerhouse walls or rooftop structures, or to a dam. When challenged to rebuild or reconductor existing transmission lines, it is often difficult for the designer to confidently assess the condition of atypical termination structures and determine their serviceability for the loads to which it may be subjected. This paper discusses some inspections and tests that were performed on 230kV termination structures anchored to a dam for a project in Montana. These activities included weld inspection, ultrasonic condition testing, bolt cluster pull-tests, and load development. Testing protocol is explained, and the results presented.

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references

ASTM Standard C805 (2018). “Standard Test Method for Rebound Number of Hardened Concrete”,ASTM International, West Conshohocken, PA, 2018.
ASTM Standard E3121 (2017). “Standard Test Methods for Field Testing of Anchors in Concrete or Masonry”, ASTM International, West Conshohocken, PA, 2017.
Wikipedia contributors. (2015, January 11). Snoqualmie Falls Power Plant No. 2. In Wikipedia, The Free Encyclopedia. Retrieved 08:20, March 7, 2022 from https://commons.wikimedia.org/wiki/File:Snoqualmie_Falls_Power_Plant_No._2_02.jpg

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Go to Electrical Transmission and Substation Structures 2022
Electrical Transmission and Substation Structures 2022: Innovating for Critical Global Infrastructure
Pages: 291 - 301
Editor: Tim Cashman
ISBN (Online): 978-0-7844-8446-3

History

Published online: Sep 20, 2022
Published in print: Sep 20, 2022

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Authors

Affiliations

P.E.
Senior Engineer, Transmission Line Design Dept., Avista Corporation. E-mail: [email protected]
Ibrahim Shamia [email protected]
Engineer, Transmission and Distribution Line Engineering, Commonwealth Associates, Inc. E-mail: [email protected]
Michael Dolan [email protected]
P.E.
Project Manager, Transmission and Distribution Line Engineering, Commonwealth Associates, Inc. E-mail: [email protected]
Yair Berenstein [email protected]
Senior Engineer, Transmission and Distribution Line Engineering, Commonwealth Associates, Inc. E-mail: [email protected]

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