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Main disadvantages of Steel Tower
so many fitting
erection cost is high
expert team required for fitting
All of these
All of these
Steel towers, used in high-voltage transmission lines, involve complex structural designs that result in higher construction and maintenance costs. The inherent complexity of lattice structures requires extensive fastening components and skilled labor for assembly and field erection.
Steel towers, used in high-voltage transmission lines, involve complex structural designs that result in higher construction and maintenance costs. The inherent complexity of lattice structures requires extensive fastening components and skilled labor for assembly and field erection.
CtotalтАЛ=CmaterialтАЛ+ClaborтАЛ+ClogisticsтАЛ тАФ The total cost function for a transmission line project, where labor and assembly complexity significantly increase ClaborтАЛ for steel towers.
The structural stability of a steel tower is achieved through a lattice assembly of angle sections. Because individual components are transported separately to minimize weight and transport bulk, the number of nuts, bolts, and fasteners is extremely high, necessitating specialized training for site engineers and workers to ensure alignment and load-bearing integrity.
Steel towers are preferred for high voltages (>66kV) due to high mechanical strength.
Lattice structures are susceptible to corrosion, requiring periodic galvanizing or painting.
Assembly requires significant field work including leveling, foundation casting, and bolting.
High mechanical strength and ability to withstand high wind loads.
Capable of carrying multiple circuits and heavy ACSR conductors.
Longer life expectancy compared to wooden poles.
High initial investment and erection cost.
Requires specialized skilled labor for assembly.
High maintenance cost due to corrosion prevention requirements.
Complexity due to massive quantity of bolts and nuts.
High voltage (HV) transmission lines.
Extra high voltage (EHV) transmission lines.
River crossings where long spans are required.
Steel towers typically use angle iron or tubular sections.
Corrosion protection is achieved through hot-dip galvanization.
Option B and C are subsets of the overall project management burden; thus, Option D encompasses all identified logistical and financial challenges.
D is correct тАФ Steel towers involve complex assembly processes with many fasteners, requiring high erection costs and expert labor, making all the listed points valid disadvantages.
Always evaluate tower selection based on voltage levels; for lower distribution voltages, reinforced concrete or wooden poles are cheaper, whereas steel is mandatory for bulk power transmission.