Materials are generally Q235(A3F/ST37-2) and Q345(16Mn/ST 52-3 ). Including all accessaries like ladder, platform, bolt and nut. based on it's shapes, it is generally divided into 5 types: Goblet type, cathead type, cathead type, shaped type and barrel type.

based on application, it can be divided into: Strain tower, straight line tower, angle tower, transposition tower (tower for transposition of wire phase position), terminal tower and crossing tower, etc.

Their structural features are:
All kinds of towers are of space truss structures.
Bard are mainly composed of single equal angle steel or assembling angle steel.
Materials are generally Q235(A3F) and Q345(16Mn).
Bars are connected by black bolts with shearing force.
Entire tower is composed of angle steels, link plates and bolts.
A few components like tower base are assemblies of welded steel plates for convenience of hot galvanizing anti-corrosion, transportation and erection. For steel towers that with calling height below 60m, shackles are mounted on one of main columns for construction people to climb to work.

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