by on March 11, 2019
Determination of analysis loads on transmission structures involves the following: 1. Wire Loads – vertical, transverse and longitudinal loads on wires due to ice, wind, temperature 2. Structure Loads – vertical, transverse and longitudinal loads on structure due to wires, attachments and hardware Secondary loads include those due to P-Delta (2nd Order) effects which will be discussed below.   1-) Load Cases and Parameters   The weather conditions considered for structural d...
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by on February 27, 2019
1-) Structure spotting Prior to any design, the engineer must establish the alignment of the transmission line taking into consideration the various criteria. These criteria include property boundary issues, soil conditions, road and other clearances, regulatory issues, environmental concerns, costs, impact on public property, aesthetics and construction access. Potential structure locations are identified along the chosen alignment using structure spotting process. Structure spotting is the ...
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by on February 22, 2019
The process of designing an overhead transmission line involves various phases or sub-processes. From a Project Management (PM) perspective, there are five (5) main sequential phases as shown in Figure 1.9. This blog is concerned with Detailed Engineering Design, which includes structures and foundations. The basic contents of each of the sub-processes are shown in Figures 1.10, 1.11 and 1.12. The other sub-processes will be discussed in the companion volume. For small projects, a PM-base...
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