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This book covers structural and foundation systems used in high-voltage transmission lines, conductors, insulators, hardware and component assembly. In most developing countries, the term “transmission structures” usually means lattice steel towers. The term actually includes a vast range of structural systems and configurations of various materials such as wood, steel, concrete and composites. This book discusses those systems along with associated topics such as structure functions and configurations, load cases for design, analysis techniques, structure and foundation modeling, design deliverables and latest advances in the field. In the foundations section, theories related to direct embedment, drilled shaf ts, spread foundations and anchors are discussed in detail. Featuring worked out design problems for students, the book is aimed at students, practicing engineers, researchers and academics. It contains beneficial information for those involved in the design and maintenance of transmission line structures and foundations. For those in academia, it will be an adequate text-book / design guide for graduate-level courses on the topic. Engineers and managers at utilities and electrical corporations will find the book a useful reference at work.
This collection contains 36 papers on structural issues in the electrical transmission industry that were presented at the 2006 Electrical Transmission Conference, held in Birmingham, Alabama, October 15-19, 2006.
This collection contains 46 papers discussing electrical transmission line engineering presented at the Electrical Transmission in a New Age Conference, held in Omaha, Nebraska, on September 9-12, 2002.
From the Foreword by Dr Valmond Ghyoot, Emeritus Professor of Real Estate, University of South Africa: ‘The valuation profession, the legal profession, property industry participants in general and students will welcome publication of this book. Investors, environmental groups and affected property owners will find essential information for use in their decision-making, development objections and claims. My hope is that [it] will provide answers where required and that it will help to improve the professional standard of valuations and appraisals internationally. I trust that it will also raise the standard of testimony in damages cases. If so, the editors and contributors will have succeeded in documenting the state of the art in this relatively unexplored terrain.’ As a reference source, this book will help quantify the negative impacts on property values of high voltage overhead transmission lines, cell phone towers, and wind turbines. It gives a modern perspective of the concerns property owners have about the siting of industrial structures used to transmit or generate various forms of energy and how these concerns impact on property values. Studies reveal concerns the public have about devices and structures that emit electromagnetic fields (EMFs) due to their potential health hazards. . Despite some research reports suggesting there are no potential adverse health hazards from high voltage overhead transmission lines (HVOTLs) and towers, there is still on-going concern about the siting of these structures due to fears of health risks from exposure to EMFs, changes in neighbourhood aesthetics and loss in property values. The siting of wind turbines is also receiving community opposition due to noise, light flicker, aesthetic concerns, and loss in property values. The extent to which such attitudes are reflected in lower property values is not well understood. Towers, Turbines and Transmission Lines: Impacts on Property Value outlines results of studies conducted in the US, the UK, Australia and New Zealand and offers guidance to valuers as well as to property/real estate appraisal students and property owners around the world. The book provides defensible tools that are becoming widely accepted to assess the effect that these environmental detriments have on property prices.
A rigorous and straightforward treatment of analog, digital and optical transmission lines, which avoids using complex mathematics.
Prepared by the Design of Steel Transmission Towers Standards Committee of the Codes and Standards Activities Division of the Structural Engineering Institute of ASCE This standard provides requirements for the design, fabrication, and testing of members and connections for latticed steel electrical transmission structures. Covering guyed and self-supporting structures, these requirements are applicable to hot-rolled and cold-formed steel shapes. The standard specifies the design criteria for structure components--members, connections, and guys--to resist design-factored loads at stresses approaching yielding, buckling, or fracture. This new edition, which replaces the previous Standard ASCE 10-97, presents minor changes to the design requirements and introduces new sections on redundant members, welded angles, anchor bolts with base plates on leveling nuts, and post angle member splices. Topics include: loading, geometry, and analysis; design of members, including compression members, tension members, and beams; design of connections, including fasteners, minimum distances, and attachment holes; detailing and fabrication; full-scale structure testing; structural members and connections used in foundations; and quality assurance and quality control. A detailed commentary contains explanatory and supplementary information to assist users of the standard. In addition, one appendix offers 17 design examples, and a new appendix offers guidance for evaluating older (legacy) electrical transmission towers. Standard ASCE/SEI 10-15 is a primary reference for structural engineers designing latticed steel electrical transmission structures, as well as for other engineers, inspectors, and utility officials involved in the electric power transmission industry.
This book provides an introduction to transmission line effects in the time domain. Fundamentals including time of flight, impedance discontinuities, proper termination schemes, nonlinear and reactive loads, and crosstalk are considered. Required prerequisite knowledge is limited to conventional circuit theory. The material is tutorial for electrical and computer engineers on the topic of transient signals on transmission lines. Emphasis has been placed on aspects of the subject that have application to signal integrity and high-speed digital circuit design issues, including proper termination schemes to avoid impedance discontinuities, reactive and nonlinear loads, and an introduction to crosstalk. The coverage focuses on the very important topic of transmission line transients which have been de-emphasized in most current textbooks. This book is prepared to supplement traditional texts for advanced students studying electromagnetics and for a vast array of practicing electrical engineers, computer engineers and material scientists with interests in signal integrity and high-speed digital design. In this second edition, examples and new problems have been added throughout. A new chapter on differential transmission lines has also been incorporated