Trial Use Guide for Transmission Structure Foundation Design-Std.691-1985 (IEEE Std)

IEEE Standards documents are developed within the Technical Committees of the IEEE Societies and the Standards Coordinating Committees of the IEEE Standards Board. Members of the committees serve voluntarily and with compensation. They are not necessarily members of the Institute. The standards developed within IEEE represent a consensus of the broad expertise onthe subject within the Institute as well as those activities outside of IEEE which have expressed an interest in participating in the development of the standard. This standard is the culmination of over six years of effort. In January, 1977, Mr. Richard D. King, Chairman of the IEEE Working Group on Loadings and Strengths for Transmission Line Structures, appointed Dr. Anthony DiGioia, Jr., as chairman of a new subgroup to prepare a guide for the design of foundations for transmission structures. Foundations for transmission structures are subjected to unique loading conditions in which a high portion of the load is transitory and involves hight uplift forces or high overturning moments with little vertical loading. Information concerning the design of foundations subjected to such loading conditions has not been readily available to designers in a single document. Thus, the objective of this guide is to provide in a single source available information on design methods for foundation design engineers. The information contained in this guide covers the modes of foundation loads for various types of transmission structures; the scope of subsurface investigations; alternate methods for designing spread foundations, drilled shafts, pile foundations, and anchors; and procedures for conducting load tests.