Assembly
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Before transmission towers are even erected, prototype towers are tested at tower testing stations. There are a variety of ways they can then be assembled and erected:
- They can be assembled horizontally on the ground and erected by push-pull cable. This method is rarely used, however, because of the large assembly area needed.
- They can be assembled vertically (in their final upright position). Very tall towers, such as the Yangtze River Crossing, were assembled in this way.
- A jin-pole crane can be used to assemble lattice towers. This is also used for utility poles.
- Helicopters can serve as aerial cranes for their assembly in areas with limited accessibility. Towers can also be assembled elsewhere and flown to their place on the transmission right-of-way.
Read more about this topic: Transmission Tower
Famous quotes containing the word assembly:
“There is a sacred horror about everything grand. It is easy to admire mediocrity and hills; but whatever is too lofty, a genius as well as a mountain, an assembly as well as a masterpiece, seen too near, is appalling.”
—Victor Hugo (1802–1885)
“There is a sacred horror about everything grand. It is easy to admire mediocrity and hills; but whatever is too lofty, a genius as well as a mountain, an assembly as well as a masterpiece, seen too near, is appalling.”
—Victor Hugo (1802–1885)
“A man may be a heretic in the truth; and if he believe things only because his pastor says so, or the assembly so determines, without knowing other reason, though his belief be true, yet the very truth he holds becomes his heresy.”
—John Milton (1608–1674)