Tubular Leg Transmission Tower

The tubular leg transmission tower uses steel tube main legs as the primary support members. The main legs are connected with lattice components to form a complete transmission tower structure.

 

It can be used for tangent, tension, angle, terminal, crossing, branch, and transposition positions. Single-circuit, double-circuit, and multi-circuit arrangements are supported.

 

The size of each tubular main leg is coordinated with total tower height, base width, crossarm length, and transmission line loads. Different tower forms can be designed for line angles from 0 to 90 degrees.

 

The product mainly serves transmission line projects of 500kV and below. Overseas designs can follow the local voltage level and technical requirements.

Common nominal heights include 12, 15, 18, 21, 24, 27, 30, 33, and 36 meters. Unequal-leg structures can be produced for complex terrain and foundations at different elevations.

Typical horizontal spans are 250–500 meters, while typical vertical spans are 300–600 meters.

The tubular leg transmission tower can be matched with LGJ-185, 240, 300, 400, and 500 conductors. GJ steel strand or OPGW optical ground wire can be used as the ground wire.

The tubular legs, crossarms, lattice members, and connection parts are produced as complete sets according to the tower position. This makes the product suitable for projects with clear requirements for main-leg structure, tower height, and line load.

Main steel can include Q235B, Q355B, or Q345B. Q420B may be used under higher load conditions. Other materials can be selected according to project standards.

Structural design can consider basic wind speeds of 23.5 m/s, 27 m/s, and 31 m/s. Ice conditions can include 5–10 mm light ice, 15–20 mm medium ice, or 20–50 mm heavy ice. Seismic conditions can be configured for site intensities of 6–8 degrees.

Components are cut and processed with laser drilling or punching in the factory. Grade 6.8 or grade 8.8 high-strength bolts are used for connections. Site installation is mainly completed by bolting.

Full hot-dip galvanizing is applied after fabrication. The regular zinc coating is at least 85 μm. Enhanced corrosion protection is available for salt-spray environments.

• Shandong Hongtaiyuan Electric Power Technology Co., Ltd. has connected processes for technical design, material supply, production planning, fabrication, quality inspection, transport installation, and after-sales service.

 

• The tower can be produced from customer drawings or physical prototypes. Materials, dimensions, and delivery schedules are confirmed before manufacturing.

 

• Workers carry out self-inspection during fabrication, and quality personnel inspect semi-finished products and packaging by sampling. Third-party inspection can be arranged by the customer.

• A two-year warranty is provided. If components are damaged or parts are missing after delivery, the after-sales team checks the issue through photos or videos and provides local handling support or replacement parts according to the actual situation.

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