Structual Design of Utility Distribution Poles and （结构设计的效用波兰人和分布）.pdfVIP

Special Research Topic Report on Current Practice in Utility Distribution Poles and Light Poles Adam Crosby Date 5/05/11 1.0 Objective The objective of this report is to present a summary of the current practice of the structural design of utility distribution poles and light poles, including the poles and foundations. This summary includes design and safety standards and codes, material specification, material selection, foundation design, design liability, and maintenance. Two common genres of poles are discussed in this report. The first genre is utility poles. Utility poles are grouped into two kinds – utility transmission and utility distribution. The second genre includes poles for lighting, traffic, homeland security, and intelligent traffic structures. The two genres of poles are analyzed and designed by the same structural principles, but they differ in governing codes and common industry practice. This report focuses on poles for utility distribution and lighting. Because they of their differences, they are treated as two separate topics in this report. The first section of the report addresses utility distribution poles and the second section addresses poles used for lighting. 1.1 Utility Poles and Structures Utility poles often support wires and other components for many utilities such as electric power, telecommunications, cable television, and fiber optic. Transmission lines typically carry the electric power from the source to substations where distribution lines branch off to supply the surrounding businesses and homes with power. Figure 1 shows a typical transmission structure. In some cases there is difficulty in making a